[HN Gopher] How fast can a human possibly run 100 meters?
       ___________________________________________________________________
        
       How fast can a human possibly run 100 meters?
        
       Author : Brajeshwar
       Score  : 102 points
       Date   : 2024-07-22 14:21 UTC (5 hours ago)
        
 (HTM) web link (bigthink.com)
 (TXT) w3m dump (bigthink.com)
        
       | boringg wrote:
       | Better question why do we spend so many global resources on such
       | a useless metric for humanity in its current life?
       | 
       | When would you ever need to be so fast at 100m that you over
       | train your body for one specific task?
        
         | SketchySeaBeast wrote:
         | Might I introduce you to the concept of sports in general? We
         | build giant coliseums costing hundreds of millions of dollars
         | devoted to keeping ice cold in the middle of summer just so
         | people can answer the question of who is best at stick puck.
        
           | bluefirebrand wrote:
           | Sports serve a social purpose, and contribute positively to
           | society's overall fitness since most people playing sports
           | aren't pro athletes
           | 
           | A 100m sprint, as fast as humanly possible is super
           | impressive, but the person you're replying to does have a
           | point: this is an extremely specific and narrow activity with
           | no purpose other than competition. You don't socialize with
           | sprinting, and most people wouldn't use 100m sprinting as an
           | activity to improve their fitness
           | 
           | At best, it's designed to test fitness, but it even fails at
           | that really
        
             | SketchySeaBeast wrote:
             | I don't think your second paragraph follows your first.
             | Just because you're doing an activity like sprinting solo
             | doesn't mean there aren't social elements. The Olympics
             | this summer will prove that hundreds of million if not
             | billions of people can come together around sprinting, and
             | several dozen other extremely specific and narrow
             | activities, if only for a brief time.
        
               | bluefirebrand wrote:
               | This doesn't reflect reality as far as I've ever seen
               | 
               | Hundreds of millions if not billions of people may
               | _watch_ sprinting, or diving or any number of niche solo
               | sports, but do they really care further than  "I hope our
               | guy wins"?
               | 
               | Do they care about the technical aspects of running or
               | discus or whatever else? Not a chance
               | 
               | It's not even remotely close to how passionate people get
               | about team sports. Millions of people will celebrate in
               | the streets if their soccer team wins a medal. People
               | will argue endlessly about the technical little details
               | of a soccer match, the calls refs make, etc
               | 
               | Solo sports aren't really comparable to team sports in
               | the social aspect, either for society or for the players
               | on the teams
        
               | LargeWu wrote:
               | Nobody who lived during the Cold War would say that solo
               | Olympic sports weren't part of a team sport, the team
               | being your nation. A solo gold medal in one of the
               | premier events (100m dash, gymnastics all-around, figure
               | skating) was just as intense as any professional league
               | championship ever was. It's not an exaggeration to say it
               | was proxy warfare and possibly prevented actual global
               | war. It was a way for those nations to express dominance
               | off the field of battle.
        
             | Nashooo wrote:
             | Just because it is not a team sport does not make it not
             | social?
        
           | drdaeman wrote:
           | Can someone help me to understand this concept? In
           | particular, _why_ so _many_ people watch it - _what_ drives
           | them them do so?
           | 
           | I'll try to explain my own vision, why I think I don't care -
           | which, of course, is entirely subjective thing, so despite it
           | may read as such it's not exactly meant to say "[some] pro
           | sports are nonsense" but rather more of "[some] pro sports
           | don't make sense for me".
           | 
           | Say, Olympic games. I can watch the opening ceremony (it can
           | be visually or aesthetically impressive), but I don't care
           | about the actual event. Yea, some folks do some impressive
           | things, that... utterly fail to impress me. I'll try to
           | explain why, and I wonder how others are different in this
           | regard.
           | 
           | I can understand watching sports that have a significant
           | strategy component to them. I would've probably watched Go or
           | chess if I would be able to understand what's going on there
           | (I don't), but I occasionally watch e-sports and those can
           | impress me with how people think outside of the box, doing
           | things that no one thought of - but that are so obvious in
           | the hindsight. For those kind of sports, when I understand
           | the game mechanics and when those feel interesting to me, I
           | can relate and feel engaged.
           | 
           | I have a suspicion that a number of people watch it (among
           | other reasons) for the "this is _our_ athlete(s) doing it "
           | vibe. This is something that doesn't click with me. Never
           | really did when I was a kid (the country I was born in
           | doesn't exist - and good riddance), and since then I've
           | immigrated a few times, so - long story short - save for
           | obligatory subconscious biases, I don't care about other
           | folks' flags and passports. But even though this is not
           | commonplace (I guess), this doesn't feel like a reason why I
           | have no feelings for the Olympics. Back to the e-sports
           | example, I watch international events, and people from
           | different bubbles bringing their different strategies and
           | play styles makes watching fun, as the games are more
           | diverse.
           | 
           | So, when someone's running, jumping, lifting, throwing,
           | shooting, spinning, or alike... I honestly don't get what
           | impresses so many _viewers_ so much everyone and their dog
           | seem to be glued to the screens. Please don 't get me wrong,
           | I _don 't_ want to diminish athletes' personal (or team)
           | achievements. What they're doing is objectively impressive,
           | but subjectively it's in some... detached, unrelated way.
           | Also, as someone raised on sci-fi I can't shake off the
           | feeling of it being sort of unimportant or meaningless on a
           | global scale - I suppose I'm gonna give post-/trans-human
           | Olympics a try, if I'll live to the day, maybe I'll find
           | something to cheer for. Not sure.
           | 
           | Either way, in the modern day, personally, I don't feel any
           | engagement as I fail to relate with the athlete, leading to
           | the total lack of the entertainment value for me. Best I can
           | do is "uh, that looks fast/heavy/far/...", but 9s, 9.5s, or
           | 12s are all the same for me - just "fast" - nothing in my
           | brain fires off, as I don't have any experience of such
           | speeds/levels of exertion anyway. So I wonder, does it for
           | others, do they subconsciously tighten their muscles
           | watching, do they feel connected or something? Maybe not,
           | because people also watch races and I suppose they don't
           | associate with horses?
           | 
           | As you can see, with all this blabbering and guessing
           | (sorry!) - I'm really confused here. I realize that even if
           | someone explains it to me, I still won't feel that way, but
           | what I'm missing is the idea - I only have guesses, and I
           | have no clue how accurate they are. And I'm curious to
           | understand others, even if a tiniest bit better.
           | 
           | ====> tl;dr: If y'all watch the professional sports (esp. if
           | aren't an athlete yourself), what makes you engaged and
           | entertained watching it?
           | 
           | Thanks!
        
         | k__ wrote:
         | Maybe, it's like art and math.
        
         | cglace wrote:
         | People want to see who is the best at X. As long as someone
         | cares who is better at X, people will try to be the best. It's
         | that simple.
        
         | Am4TIfIsER0ppos wrote:
         | Without circuses you better hope everybody has bread.
        
         | tbrake wrote:
         | Before you asked the first question did you try to put yourself
         | in someone else's (running) shoes and figure out their motives?
         | If you haven't, try. Steel man the case for running and getting
         | better at running before you just declare it "useless."
        
         | shadow28 wrote:
         | It's fascinating to see the physical limits of a human body
         | being pushed as far as possible.
        
           | SketchySeaBeast wrote:
           | And not just physical. There's an iron hard will in there
           | pushing past those limits.
        
         | FeteCommuniste wrote:
         | People like watching excellence in action, especially if it's
         | in a domain they can relate to in some way. Almost everyone has
         | tried to run as fast as they could at some point, so they're
         | naturally curious to watch others who have spent years training
         | to do it really, really well.
        
           | jojobas wrote:
           | People like all sorts of useless things, and their life gets
           | worse once they get introduced to them. The amount of people
           | involved in pro sport is lamentable.
        
             | FeteCommuniste wrote:
             | How are sports any less "useful" than other spectation-
             | based forms of entertainment like watching movies, reading
             | novels, or listening to music?
        
               | jojobas wrote:
               | You get no getting new insight, catharsis or inspiration
               | from watching someone run. Like chewing gum, it exploits
               | your desire to watch, but there's no substance.
               | 
               | Then again, there's the problem of how thousands of kids
               | drop out of school to become pro athletes, and don't even
               | reach college level, and the problem of colleges
               | admitting illiterate athletes and letting them graduate
               | illiterate for "prestige".
        
               | SketchySeaBeast wrote:
               | Your initial complaint was about all pro-sports, would
               | you say your argument:
               | 
               | "You get no getting new insight, catharsis or inspiration
               | from watching someone run."
               | 
               | Applies to all of them?
        
               | jojobas wrote:
               | Yes. You have Einstein's "Dostoevsky gives me more than
               | any scientist, more than Gauss!", and I don't think
               | anyone of note ever said anything like that about any
               | athlete. Yes, pro sports beget more pro sports, but
               | that's not a positive feature.
        
               | SketchySeaBeast wrote:
               | It seems like you're over-intellectualizing the human
               | experience. You don't think anyone has been inspired by
               | sports? I just watched my entire city come alive with
               | Stanley Cup fever. People were having a great time, it
               | was a party the whole time.
               | 
               | I barely understand the sport itself, I'm not a team
               | sports guy, but to deny the excitement, inspiration, and
               | sheer joy seems ridiculous under the crushing weight of
               | the energy sports can bring people. People use it to
               | better themselves, not just trying to get more pro
               | sports, and that's a goal I think every person should
               | strive towards. We are thinking things, but we're also
               | masses of tissue, and it's important to celebrate that
               | connection and that part of us.
        
               | aeyes wrote:
               | > You get no getting new [...] inspiration from watching
               | someone run.
               | 
               | I'm an amateur runner and I get immense inspiration from
               | watching pro athletes run, I'll never get half as good
               | but it gives me a huge push to keep working towards my
               | own goals.
        
               | SketchySeaBeast wrote:
               | I feel like people railing against these things are
               | people who aren't aware of the various subcultures. It
               | doesn't matter if you're a runner or a powerlifter, we
               | all have people we see who inspire us. Just because Joe
               | Schmoe doesn't know them doesn't mean no one does.
        
               | chasd00 wrote:
               | i get a lot of inspiration out of watching top sports
               | teams perform. Basketball and American football
               | especially. Basketball for the level of coordination
               | between players and American football for the different
               | specialized experts working together.
        
               | el_duderino_ wrote:
               | Just because you do not get any benefit from watching
               | athletes excel does not mean it is devoid of substance. I
               | find it inspiring to watch someone do something that they
               | have spent years working to achieve. Seeing them do the
               | "impossible" through hard work and dedication is a great
               | moment.
        
         | bglazer wrote:
         | How many people and resources (dollars) would you estimate are
         | involved in professional track and field?
         | 
         | Bonus points if you express this as a proportion of total human
         | population and economic activity
        
         | LargeWu wrote:
         | Sport, in general, is about the quest for excellence. It's a
         | tradition that dates back millennia, across nearly all
         | cultures, which suggests it is a deeply-rooted and possibly
         | evolutionary trait in humans. Racing in general, and
         | specifically the 100m dash, the crown jewel of track and field,
         | might be considered one of the purest expressions of athletic
         | excellence.
        
           | boringg wrote:
           | I understand the sentiment - and yes tradition is important
           | in human culture. That said its like we've trained so acutely
           | for the test but the test doesn't really answer any good
           | questions.
           | 
           | Historically running had a very important part of humanity.
           | You needed to run from animals for hunting, if you were a
           | warrior you needed to fight and run, etc. It feels like this
           | is one of those races that was historically important as a
           | human metric but no longer has the heft of value except for
           | nostalgia.
        
             | SketchySeaBeast wrote:
             | What are physical tests that are actually important to a
             | modern day human? I don't think there's anything that can
             | be taken to an extreme that is a good measure of an
             | activity that is valuable to modern society.
        
               | boringg wrote:
               | Long distances sports actually have excellent returns on
               | emotional regulation, health and well being. Very
               | important to modern day humans.
        
               | SketchySeaBeast wrote:
               | Well, if you want to view it in that broad of light,
               | pretty much all physical activity has excellent returns
               | on emotional regulation, health, and well being,
               | including sprinting.
        
             | LargeWu wrote:
             | I mean, you could say the same thing about art. What value
             | does art provide? We don't need it for survival.
             | 
             | Art and sport are things that make the human experience the
             | human experience. That is their value. They exist and are
             | important for their own sake.
        
         | Tao3300 wrote:
         | There are worse things we could be doing with our time.
         | Personally I'd rather watch the synchronized swimming.
        
         | piva00 wrote:
         | Because humanity is not about minmaxing a game where output is
         | the most important metric. We are humans, and a human thing to
         | do is sports, we love being impressed by other's physical
         | prowess even if they are narrow and of no economic value.
         | 
         | Why do people paint? Or make music? Or play football (whatever
         | version of it)?
         | 
         | Because we like to do it.
        
         | zepolen wrote:
         | Mainly because it sells, but also because the pioneers never
         | needed a reason beyond why not.
        
       | Jarmsy wrote:
       | Aren't the numbers at the start of the article mixed up?
       | 
       | It starts by saying "Other than Bolt, no human has ever run 100
       | meters in under 9.73 seconds" Then just below there's a table of
       | records showing 3 other runners with sub 9.73 times.
        
         | Grifnag wrote:
         | They might have changed the article. It now says "Other than
         | Bolt, no human has ever run 100 meters in under 9.69 seconds".
         | The table then shows Tyson Gay and Yohan Blake have matched
         | that time, but not beaten it.
        
           | chakintosh wrote:
           | > Tyson Gay
           | 
           | Shouldn't even be considered due to his history with doping.
        
             | noarchy wrote:
             | >Shouldn't even be considered due to his history with
             | doping.
             | 
             | People are naive about how much sports are riddled with
             | PEDs. It certainly isn't just Tyson Gay. You only know
             | about the ones who get caught. But there is enough info out
             | there to suggest that getting caught is just a matter of
             | slipping up.
        
               | chakintosh wrote:
               | I'm talking about him in relation to Usain Bolt. The
               | latter is yet to be caught doping (if he is on juice to
               | begin with).
        
               | noarchy wrote:
               | >I'm talking about him in relation to Usain Bolt. The
               | latter is yet to be caught doping (if he is on juice to
               | begin with).
               | 
               | Of the top men's 100m runners (in terms of times) only a
               | few escaped the testing dragnet unscathed, one of which
               | is Bolt. As entertaining as Bolt was to watch I have
               | little faith that he was clean at his peak.
        
             | SirMaster wrote:
             | I mean for fair competition no. But the article doesn't
             | seem to be caring about that. Just how fast can a human
             | possibly run. I don't know that chemical based enhancements
             | should necessarily be off the table. But physical
             | augmentations should probably be off the table.
        
             | Grifnag wrote:
             | I think Bolt is the only one of the 5 sprinters named in
             | the table in that article who hasn't tested positive or
             | served some kind of ban for doping.
        
           | ry4nolson wrote:
           | right before that line it says bolt ran it in 9.58, no one
           | else has ever ran UNDER 9.69
        
         | ericmcer wrote:
         | It's crazy how all the records are him and people who competed
         | against him. Really shows how strong competition can bring out
         | the best in you.
        
           | lostlogin wrote:
           | > Really shows how strong competition can bring out the best
           | in you.
           | 
           | In cycling there is also a tech, nutrition and physiology
           | aspect to it. Obviously the tech side is much reduced in
           | running (though clothing and shoes might get some) and Bolt's
           | diet was notoriously poor.
        
       | tcfunk wrote:
       | I've never seen Usain Bolt's speed in terms of mph before this
       | article. A top speed of 27.8 mph is seriously incredible. Granted
       | I'm no professional sprinter, but when I try to go much beyond
       | 14-15 my balance can't keep up with the cadence and I start to
       | trip over myself.
        
         | bluefirebrand wrote:
         | I'm betting there are people who can barely go 27.8 mph on a
         | bike at their top speed
         | 
         | That's unbelievable to imagine honestly, someone on a bike
         | going as fast as they can and this guy sprinting past them
         | 
         | But it's reality
        
           | martopix wrote:
           | I would say the _majority_ of people would not reach that
           | speed on a bike in normal situations
        
             | bluGill wrote:
             | A downhill where a road bike can reach that speed is pretty
             | normal. I reach those nearly every day on my to work
             | commute and I live in Iowa - there is a reason we are known
             | for being flat so if I can find a hill to reach those speed
             | surely anyone else can too. Of course I am riding a road
             | bike, kids and mountain bikes may have limitations (tires?)
             | that slow them down.
             | 
             | Reaching those speeds on level ground doesn't seem possible
             | for a normal human, but level ground is rare.
        
               | toast0 wrote:
               | I can hit 45 mph going down hill on my 1980 road bike...
               | but that's just balance, carrying enough potential
               | energy, being too stupid to slow down to a reasonable
               | speed, and having hills that I have to walk the bike up
               | most of the time. There's some skill and physical
               | conditioning there, but not a whole lot; at that speed,
               | there's a lot of instant feedback on form, which helps
               | encourage one to get low and tight.
               | 
               | I think if we're talking about how fast you can get your
               | bike to go, flat land, still air is implied. I don't have
               | a lot of those conditions to try, but I'm happy to cruise
               | around 15, and maybe push it to 20 if I don't need to
               | save my energy for a nearby hill.
        
               | PaulDavisThe1st wrote:
               | I'm not sure what you might mean by a "normal human".
               | 
               | I used to be a back-of-the-front-of-the-pack triathlete,
               | with a previous history as an ultramarathon and touring
               | cyclist. In my best shape (probably aged around 46), I
               | was training on a flat loop course with some younger very
               | strong but not professional cyclists where we would
               | generally pull the group at 28mph for about between 20-60
               | seconds at a time.
               | 
               | I appreciate that there's a distance between that sort of
               | thing and an "average person", but it's not a whole lot
               | larger than the distance between the people who were in
               | the group and, say, professional tour cyclists.
        
           | alfiopuglisi wrote:
           | Most people won't be able to even reach 27.8 mph on a bike,
           | you need a decent road bike and some training.
        
             | kazinator wrote:
             | I suspect that "most people" even includes the guy who
             | sprinted at 27.8 mph. The crank lengths and gearing are all
             | wrong on a bike for an explosive sprint, preventing all the
             | right muscles from being recruited to the job. No matter
             | the speed and gear, your feet are constrained into spinning
             | around the same smallish circle. And wile you can use your
             | whole body in order to sprinting on a bike, it's not the
             | same like when a running sprinter uses their entire body.
        
               | alfiopuglisi wrote:
               | Mmmhh, not sure about that. Most people, even if not
               | reaching high speeds, can still go substantially faster
               | on a bike than running. Even grandmas, it's all relative.
               | 
               | People like Bolt should be compared with bike sprinters,
               | who top out at around 45mph.
        
               | lostlogin wrote:
               | You can look at Tadej Pogacar's recent rides on Strava.
               | 
               | It's awe inspiring. His times are just so fast, and over
               | hilly terrain in the heat, for day after day.
        
               | thrownblown wrote:
               | apples to oranges. Look up this meatball
               | https://en.wikipedia.org/wiki/Robert_F%C3%B6rstemann
        
               | thrownblown wrote:
               | Top level competitive flying 200's are sub 10s. That's an
               | average speed over the timed distance of 72km/h or 44.75
               | mph with a peak around 75-77km/h.
               | 
               | https://en.wikipedia.org/wiki/World_record_progression_tr
               | ack...
        
             | Xenoamorphous wrote:
             | Or just go downhill.
        
           | klyrs wrote:
           | When I was in my 20s, I was in great shape, riding thousands
           | of miles a year (distance riding, not racing). On a flat,
           | straight track in still air, I'm pretty sure my top speed was
           | around 32mph. And while pro cyclists would scoff at my
           | personal best there, most people aren't even coming close to
           | that.
        
             | kachapopopow wrote:
             | I was going to say only 32? Then realized it was miles per
             | hour.
        
               | mp05 wrote:
               | Flat land 32mph? That's pretty good! I can barely get
               | over 30.
        
           | _trampeltier wrote:
           | On indoor tracks, bikes do something like 45mph
        
           | amalcon wrote:
           | A class 3 ebike (the kind legal on most streets but illegal
           | on most rec paths due to their speed) has a top speed of
           | 28mph, so I would say so. Barring a steep decline of course.
        
           | WalterBright wrote:
           | I wouldn't go near that speed on a bike wearing a tour de
           | france outfit. Crashing at those speeds will be very, very
           | painful.
           | 
           | A friend of mine had a low speed crash on his bike, and
           | knocked his front teeth out. After that, both he and I bought
           | full face helmets.
           | 
           | When I ride dirt bikes, I wear a full set of armor. I look
           | like a storm trooper. But I've crashed many times, and was
           | unhurt. The armor is worth every penny. (The only way to
           | learn how to ride a dirt bike is by crashing it.)
        
         | Svoka wrote:
         | few people can go over 45 km/h on bike on flat ground.
        
           | kazinator wrote:
           | I did about that speed for about half a mile once, but I was
           | drafting close behind a 2 ton truck. :) The truck's driver
           | was taking it easy for whatever reason. I noticed that and
           | slipped into the slipstream. Once in the slipstream, it felt
           | like no effort; like bicycling downhill.
        
             | inglor_cz wrote:
             | How close did you have to go to the truck in order to make
             | use of the slipstream?
        
               | kazinator wrote:
               | If I were to guess today, I'd say that my front wheel was
               | within about 2 meters or so of the tail gate.
               | 
               | This is obviously dangerous, but the truck was going
               | slow; slow enough that if it slammed on the brakes, I
               | would have been able to react (and failing that, not get
               | badly hurt).
               | 
               | It was a strange sensation. It took effort to pedal up to
               | the tailgate, but then you feel the effort drop off, as
               | if you went over an invisible ridge.
        
               | lostlogin wrote:
               | Not op - you can get a similar but limited version of
               | this from sitting behind other bikes. e-bikes are a prime
               | target if your heading into the wind.
               | 
               | They are usually speed limited to below what a road bike
               | travels at, but in bad weather they are very useful
               | windbreaks.
        
               | kazinator wrote:
               | I think that used to be true in the early wave of
               | e-bikes.
               | 
               | Today, I regularly see e-bikes and scooters easily
               | keeping up with traffic that is moving upward of 50 km/h.
               | 
               | If there are still e-things on the market today with
               | speed limitations not related to their power capacity,
               | people must be easily working around those limits
               | somehow, with firmware patches or secret codes or what
               | have you.
               | 
               | Most of the stuff comes from China, which is an
               | uncontrollable entity that doesn't care about regulations
               | in North America and elsewhere.
        
               | PaulDavisThe1st wrote:
               | In a reasonably sized pack of cyclists, being in the pack
               | instead of being the lead cyclist requires 30% less
               | power.
        
         | chakintosh wrote:
         | That's in part why sprinters are jacked. They need to keep
         | their core from leaning forward at such high speeds.
        
           | SJC_Hacker wrote:
           | My reference for "jacked" would be more like a bodybuilder.
           | Sprinters aren't really "jacked" more like lean and muscular.
        
             | cratermoon wrote:
             | Professional bodybuilders all use steroids. There are
             | "natural" bodybuilders that don't use steroids or PEDs, and
             | a few competitions for them, but the sport in general is
             | saturated in drugs.
        
           | hanniabu wrote:
           | As a runner I find this comment hilarious. Not sure what type
           | of relationship you see between speed and leaning forward,
           | but there is none.
        
         | glitchc wrote:
         | I think if Bolt really pushed himself, he could have broken sub
         | 9.5 seconds at the peak of his ability. In all races where he
         | dominated, we see him slack off right near the end once he
         | realizes how much further ahead he is of everyone else.
        
           | walthamstow wrote:
           | Not to mention the diet of chicken nuggets, particularly in
           | Beijing where that was basically all he ate for weeks.
        
             | iknowSFR wrote:
             | He broke his own WR in 2009 in Berlin.
        
               | hanniabu wrote:
               | For both the 100m and 200m
        
           | SJC_Hacker wrote:
           | Is it slacking off or was it simply his limit.
        
             | Vvector wrote:
             | Did you watch his races?
        
             | nervousvarun wrote:
             | At this short of distance it would be slacking off. However
             | if you watch his world breaking run (vid below) to me it
             | appears he's likely not doing that.
             | 
             | Personally would argue these guys do this same
             | sprint/distance so many times in practice/competition that
             | they generally implicitly know when they're running a WR
             | type time and generally don't slack off (in this video he's
             | not in any threat of being caught but still presses on for
             | the WR).
             | 
             | https://www.youtube.com/watch?v=3nbjhpcZ9_g
        
       | jccalhoun wrote:
       | I've always said they need to have a non-athlete run next to the
       | athletes so we can tell just how fast these runners are.
        
         | kazinator wrote:
         | Elite race walkers embarrass recreational runners with sub-40
         | 10 km times.
         | 
         | There you are, running your heart out, and some guy walks right
         | past you.
        
           | rowanG077 wrote:
           | It's hardly "walking". It's basically just a silly way to
           | run.
        
             | ketzo wrote:
             | "Race walking" is distinguished from "running" based on
             | technique. In this case, "walking" is defined very strictly
             | as "never having both feet off the ground."
             | 
             | Yes, obviously it's just a silly way to run, if "run" is
             | "move fast on foot".
             | 
             | It's just that "race walking" is fewer words than "a silly
             | way to run where you have to keep one foot on the ground
             | always."
        
               | inglor_cz wrote:
               | This isn't strictly enforced, though.
        
               | swores wrote:
               | It's not that it isn't enforced, it's that the rule is
               | very specifically that it must appear that one foot is
               | always touching the ground when watched in real time with
               | human eyes, the rule isn't that one foot must technically
               | always be touching the ground.
        
               | buzzerbetrayed wrote:
               | That very well may be the rule, but you can't then argue
               | that it isn't a "silly way to run". It clearly is if both
               | feet can be in the air at the same time.
        
               | kazinator wrote:
               | There is also a rule about a straight leading leg. That
               | puts a limit on the leaping. A leg not being straight is
               | pretty visible.
        
             | glitchc wrote:
             | We can't call it running if at least one foot has to be on
             | the ground at a time. That requirement also drastically
             | limits stride length, giving an inherent advantage to the
             | runner.
        
               | IncreasePosts wrote:
               | If you watch professional speed walkers they frequently
               | have both feet off the ground.
               | 
               | Just like in the NBA many players travel all the time,
               | but it just isn't called.
        
               | crustaceansoup wrote:
               | It's an open secret that "cheating" (i.e. not having both
               | feet planted) is ubiquitous, to the point that since 1996
               | the official rule is now "not naked-eye visible loss of
               | contact, or visibly bent knee". You can watch any slow-
               | motion video of racewalkers and they seem to lose contact
               | on every stride.
        
               | teruakohatu wrote:
               | And they seem to break that break even that very loose
               | rule when they think they can get away with it. With
               | cheap modern tech I am sure they could enforce the
               | contact rules.
        
               | klyrs wrote:
               | A bomb on a pair of deadman switches? You don't need
               | modern tech...
        
           | LanceH wrote:
           | They aren't embarrassing anyone. If that's walking fast, I'm
           | walking slow.
        
           | klyrs wrote:
           | Hilariously, I got passed by a runner on my bike just
           | yesterday. We were both trudging up a mountain. I suggested
           | she carry my bike; she demurred. Eventually when the terrain
           | leveled out a little bit, I left her in the dust.
        
           | mcbutterbunz wrote:
           | The 4-minute-mile is an average of 15mph. I haven't measured
           | how fast I can sprint, but at my age (40s), I doubt its
           | higher than 15mph for any timespan longer than a few seconds.
           | So milers effectively sprint for 4 minutes straight. Its mind
           | boggling what the human body can do.
        
             | PaulDavisThe1st wrote:
             | I don't think you're familiar with the performance levels
             | of masters (40+) atheletes.
             | 
             | I'm 60 now, but in my 40s I was a moderately good marathon-
             | to-ultramarathon runner, and with a little bit of speedwork
             | training, I managed to run a 5:30 track mile. That's not
             | even fast - I had friends of the same age who could run
             | 4:30.
             | 
             | It is truly remarkable what the human body can do - the
             | world record for the marathon involves running 26.2 miles
             | faster per mile than I could ever run 1 mile.
             | 
             | But if you can't sprint faster than 4mph for a few seconds,
             | that's fine but it's not indicative of "at your age".
             | Unless you have some actual health issue that prevents it,
             | I would very surprised if you were incapable of hitting
             | 6mph for a mile with some training, and a lot of people
             | would not find it tremendously hard to hit 6.5-7mph if they
             | had the time and motivation to train.
        
         | dorkwood wrote:
         | "Beat the Freeze", a half-time show the Atlanta Braves used to
         | put on, is pretty close. It's where a member of the crowd takes
         | on a former collegiate sprinter in a 160m race, and they're
         | given a five second head start.
         | 
         | https://m.youtube.com/watch?v=3UzW1aJXRUw
        
           | oneeyedpigeon wrote:
           | That last one is very unlucky -- it was never a full 5 second
           | head start!
        
             | teruakohatu wrote:
             | I hadn't heard of this event before but watching the video
             | it does seem like the last one might have beaten the freeze
             | if they had got a full 5 seconds head start. Makes you
             | wonder if the freeze head start is based on how fast you
             | run / how fit they think you are.
             | 
             | It seems like when the freeze is beaten, he is beaten by a
             | hardcore amateur:
             | 
             | https://www.mlb.com/video/braves-fan-beats-the-freeze
        
               | js2 wrote:
               | It's clear from his form that he's an experienced runner.
               | I googled a bit. He ran track in HS and at least the
               | start of college. These were his HS senior times:
               | 
               | > Was the Region 6-AA Champion for finishing first in the
               | 5k in 2010... Finished third in the state in the 5k in a
               | time of 17:46.66 during the 2010 season.
               | 
               | https://ksuowls.com/sports/mens-track-and-
               | field/roster/parke...
               | 
               | https://www.fox5atlanta.com/news/new-dad-atlanta-braves-
               | supe...
        
               | fckgw wrote:
               | It's likely when the challenger happens to pass a certain
               | part of the field, and most people cross that around 5
               | seconds in.
        
           | IncreasePosts wrote:
           | The dudes they pick utilize poor strategy. They come out the
           | gate hot, and are gassed by 50% of the race. Really, they
           | should be running at a pace they can just barely maintain to
           | the end, and then push all out the last 20m
        
             | js2 wrote:
             | I've run over two dozen marathons. Even at that distance,
             | it takes a lot of discipline to not go out too fast. These
             | are random people they find in the stands who are going to
             | be very amped up in the moment. Strategy is the furthest
             | thing from their minds and even if weren't, it takes
             | practice to know what your ideal pace is.
        
             | bfung wrote:
             | Strategy is only good for really, really good runners.
             | 
             | At ~160m, (similar to the 200m), at-pace speed for the pro
             | is already all-out for the average person.
        
           | jihadjihad wrote:
           | > half-time show the Atlanta Braves used to put on
           | 
           | halftime in baseball?! :P
        
             | toast0 wrote:
             | Yeah, halftime in baseball is after the first two quarters,
             | and before the third and final quarter. :P
        
         | dzonga wrote:
         | here's [0] a NFL bound defensive lineman weight over 340 lbs
         | running a 40 yard dash in 4.82 .
         | 
         | i'm half his weight and change. yet he would be faster than me.
         | 
         | [0] https://www.youtube.com/watch?v=B5Ozz3rgKHU
        
           | FredPret wrote:
           | Imaging colliding with this guy. Like shouldering a
           | locomotive
        
       | cb321 wrote:
       | Statisticians think it can be gotten down to 9.51 seconds (
       | https://www.sciencedaily.com/releases/2009/08/090806080343.h...
       | ), though, as with most things statistical, knowledge of the
       | underlying sampling process (biology/physiology & physics in this
       | case) may shed more light. { Similarly, knowledge (& tweaking!)
       | of OS schedulers may be able to reduce measurement noise more
       | than pure statistics in a project to time software like
       | https://github.com/c-blake/bu/blob/main/doc/tim.md .}
        
         | herendin2 wrote:
         | That research was published before Bolt hacked another 0.1
         | seconds off the record, when he cut it down in one event from
         | 9.69 to 9.58
         | 
         | I don't think the research stands up.
        
           | cb321 wrote:
           | They would certainly have to add that new data point to their
           | analysis. :-)
           | 
           | I expect it moves the estimate down by less than the 100 ms
           | record beat, though. That's how converging to a true minimum
           | tends to work (at least, like I said before, in the purely
           | statistical modeling sense which is never quite as strong as
           | a detailed micro-model).
        
           | goatlover wrote:
           | How do you know Bolt isn't close to the maximum? He is
           | definitely an outlier.
        
       | farceSpherule wrote:
       | How fast? Is this with or without performance enhancing drugs?
        
       | Mistletoe wrote:
       | I can read all these technical extrapolations of physics but I
       | don't think humans can run much faster than Usain or they would
       | currently do so. Without more performance enhancing drugs and I'm
       | assuming we don't want that. We are going to live in a weird
       | world in the future when we realize things can't just continue
       | forever up and to the right on all charts. We may just live at
       | the plateau for eons. I believe we are all very lucky to have
       | lived at a very special time in human history.
       | 
       | https://www.cold-takes.com/this-cant-go-on/
       | 
       | And I think it is smart to prepare yourself for when the world
       | realizes that stuffing money into stocks can't give 10% every
       | year forever. And all hell will break loose because that is what
       | our whole world is currently built upon. I don't know when that
       | will happen, but mathematically we can prove that it must happen
       | eventually.
        
         | willsmith72 wrote:
         | I was reading this carefully looking for the reason of "why
         | this can't go on", and seemingly this is the reason
         | 
         | > if the economy were 3*1070 times as big as today's, and could
         | only make use of 1070 (or fewer) atoms, we'd need to be
         | sustaining multiple economies as big as today's entire world
         | economy per atom
         | 
         | What kind of argument is that? Sounds like someone had an idea
         | and went looking for evidence to support it.
         | 
         | > mathematically we can prove that it must happen eventually
         | 
         | Please explain, and not using a reasoning comparing dollars to
         | atoms
        
           | Mistletoe wrote:
           | The math for increasing 10% per year over any long length of
           | time gets so crazy that you have to use how many atoms exist
           | as an absurd placeholder. Dollars don't work anymore.
           | 
           | The rule of 72 says at 10% per year (historical returns in
           | the stock market for the past 100 years) means you are
           | doubling the value of the stock market every 7.2 years.
           | Things like economies can't grow like that and if you are
           | questioning why it's because you and I grew up in this era
           | where they could for a brief blinking in time. Human
           | reproduction is slowing, we've harvested all the low hanging
           | fruit, "free" land is all taken. I feel like we are probably
           | at the part of the 100m dash curve talked about here.
           | 
           | https://condellpark.com/kd/sprintlogistic.htm
           | 
           | At our current rate, the record of 9.48s will be reached in
           | 500 years if you plot it. But I don't think people are going
           | to maintain interest for 500 years to get there from 9.58
           | seconds.
        
             | willsmith72 wrote:
             | > Things like economies can't grow like that
             | 
             | says who?
             | 
             | if i were born and living in the 1500s, how could i predict
             | the economy would soon grow 10%/year for over a century?
             | 
             | you're just stating things like facts which have never been
             | predictable. nothing about our current growth was
             | inevitable, neither is a gigantic slowdown.
             | 
             | i think these kinds of predictions are:
             | 
             | 1. far more difficult than we realise
             | 
             | 2. so difficult that there is almost no value in making
             | them.
        
               | likeclockwork wrote:
               | The Church of Infinite Growth has been riled.
        
               | willsmith72 wrote:
               | \\_(tsu)_/-
               | 
               | the writer of the article could have just as easily
               | predicted an epic slowdown as infinite growth. that's how
               | much evidence and reasoning they provided. it's the
               | monkey throwing darts
        
         | n4r9 wrote:
         | > Without more performance enhancing drugs and I'm assuming we
         | don't want that.
         | 
         | I mean, what are the arguments against PEDs? I guess that they
         | carry risks for the athletes and unfair advantages. It's
         | conceivable that future tech will enable us to legalise and
         | regulate drugs in much the same way as we do equipment now. If
         | that leads to records being smashed, I think the general public
         | will probably come round to it.
        
           | Mistletoe wrote:
           | For myself, I don't like them because I know they come with
           | health risks and that makes me watching the events like a
           | roman citizen watching gladiators die for their
           | entertainment. And I try to stay away from that as much as
           | possible.
        
             | n4r9 wrote:
             | Sure. But it's conceivable that future tech will produce
             | drugs and doping regimes that minimise the health risks.
        
               | mikestew wrote:
               | And if a frog had wings it wouldn't bump its ass when it
               | hops. You asked for the argument against PEDs, and right
               | now the argument is that they have adverse effects on
               | health. If the health effects ever change in the future,
               | then we can revisit.
        
             | mikestew wrote:
             | Even in events you _don't_ watch, like the Bumphuck Senior
             | Games 40+ Steeplechase, people are doping. And as a
             | competitor in endurance sports, I don't want to have to
             | take PEDs and risk my health just to stay competitive in
             | bullshit, no-one-cares-but-your-Mom local amateur events.
        
             | gadders wrote:
             | "There is evidence that the pattern of banned substance use
             | in elite athletes is high, yet morbidity and mortality of
             | elite athletes is not greater than the general population,
             | and former elite athletes live longer and healthier lives
             | than age-matched controls. There is evidence that misuse of
             | PEDs, often obtained from the black market, without medical
             | guidance or intervention contributes to morbidity and
             | mortality in recreational athletes, but this pattern is not
             | evident in elite athletes."
             | 
             | https://www.sciencedirect.com/science/article/abs/pii/S2211
             | 2...
        
             | drdaeman wrote:
             | > they come with health risks
             | 
             | Professional sports inherently come with health risks. They
             | are unhealthy almost by definition.
             | 
             | If someone wants to risk their well-being for achievement,
             | fame, big money and/or anything else (which is crazy, but
             | people do crazy stuff) - it is more beneficial for the
             | society if it's all transparent and goes into scientific
             | papers and not some anti-doping agency or court papers.
        
           | dfxm12 wrote:
           | _If that leads to records being smashed, I think the general
           | public will probably come round to it._
           | 
           | I'm not so sure this is a given. See: Barry Bonds.
        
         | generic92034 wrote:
         | > Without more performance enhancing drugs and I'm assuming we
         | don't want that.
         | 
         | Depends on the "we":
         | 
         | https://en.wikipedia.org/wiki/Enhanced_Games
         | 
         | I do not think it is very responsible to increase the
         | incentives even more for exploiting your own body. Also, a
         | mindset like that might easily spill over into "normal" jobs.
        
       | b450 wrote:
       | I guess this is just a silly little thought experiment, but the
       | final estimate (6.97s 100m) is quite ridiculous on its face.
       | 
       | The heavy lifting seems to be done by the study linked in the
       | "anatomical studies suggest peak speeds up to 15.6-17.9 m/s
       | (35-40 mph) are achievable" line. I'm not sure where those exact
       | numbers were pulled from - I can't find them with a cmd+f. One
       | line in the study uses some nearby numbers:
       | 
       | > If, for simplicity, we assume no change in contact lengths or
       | the minimum aerial times needed to reposition the swing limbs at
       | top speed, the average and greatest individual top speed hopping
       | forces (Favg) of 2.71 and 3.35 Wb would allow top running speeds
       | of 14.0 and 19.3 m/s and of 50 and 69 km/h, respectively
       | 
       | But the study concludes that, even though our leg extensor
       | muscles can produce much higher maximum forces than those
       | generated during sprinting, the "contact length" imposes a
       | constraint on these "hopping forces":
       | 
       | > Because humans have limbs of moderate length and cannot gallop,
       | they lack similar options for prolonging periods of foot-ground
       | force application to attain faster sprinting speeds at existing
       | contact time minimums. Consequently, human running speeds in
       | excess of 50 km/h are likely to be limited to the realms of
       | science fiction and, not inconceivably, gene doping.
       | 
       | So the craziness of the original estimate seems to follow from on
       | a misreading of that study.
        
         | buildbot wrote:
         | Humans can't gallop?
         | 
         | https://www.discovermagazine.com/planet-earth/why-humans-pre...
         | 
         | https://journals.biologists.com/jeb/article/216/7/1338/12063...
        
           | jamiek88 wrote:
           | We don't do it efficiently or effectively would be better
           | than saying we cannot do it.
           | 
           | It's only useful for going downhill quickly which we've all
           | subconsciously or perhaps even mindfully done.
           | 
           | From your link:
           | 
           | > Gallopers exerted that effort unevenly, with the front leg
           | doing more work than the back leg. And the galloping stride,
           | researchers saw, demanded more from the hips than running
           | did.
           | 
           | This tired people out quickly. Out of 12 treadmill gallopers
           | in the study, 4 gave up before the end of their 4-minute
           | session, complaining of fatigue and stress in their hips and
           | thighs.
           | 
           | (An intended 13th galloper couldn't figure out how to gallop
           | on the treadmill belt in the first place.)
           | 
           | When researchers calculated their subjects' metabolic rates,
           | they found that galloping was about 24% more costly than
           | running at the same speed. In other words, galloping burns up
           | more energy, takes more effort, and is less comfortable than
           | running.
           | 
           | It's no wonder we don't usually opt for it
        
             | buildbot wrote:
             | > Because humans have limbs of moderate length and cannot
             | gallop
             | 
             | Yes, we don't because it's not great, but that's not the
             | same as not being able to. (This is very pedantic sorry,
             | it's just a stronger claim than it needs to be which
             | bothers me).
             | 
             | Also, I wonder if that changes if you have very uneven leg
             | lengths?
        
           | ohyes wrote:
           | I mean, this is a bipedal gallop, standing upright. What if
           | someone were to train for running on both their hands and
           | feet, the way a horse, dog, or cheetah does? I've seen a
           | video of a young woman doing this, and it looked very
           | uncomfortable/unnatural and it was frankly terrifying to
           | imagine a human running at you in this way.
           | 
           | Mechanically it seems like the advantage would be using more
           | muscles and being able to take advantage of your core and
           | upper body when pushing off in addition to the legs. landing
           | seems like it would be a challenge as fingers aren't really
           | made for that.
        
             | ljlolel wrote:
             | In 2048, the fastest human on the planet will be a
             | quadrupedal galloping man
             | 
             | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4928019/
        
               | pfortuny wrote:
               | "The winning time was fitted to a rational fraction curve
               | for the quadruped records (r2 = 0.823, adjusted r2 =
               | 0.787, F = 26.9, P < 0.05) and to a linear curve for the
               | biped records (r2 = 0.952, adjusted r2 = 0.949, F =
               | 336.1, P < 0.05; Figure Figure1).1)."
               | 
               | Unfortunately, a linear extrapolation implies that at
               | some time, the bipedal 100m will take negative time...
        
             | js8 wrote:
             | I saw a video about that which claimed that 4-legged
             | running is in general faster than 2-legged running. The
             | video concluded that it might be possible for humans to
             | "run" faster with 4 limbs rather than 2 limbs, if trained
             | properly. Btw they also mentioned the record in 100m 4-limb
             | running is something over 15s.
        
       | kawsper wrote:
       | That guy Usain Bolt and his 9.58 seconds is nothing compared to
       | my local Strava runners, all the segments are full of faster
       | "runners".
        
       | DrBazza wrote:
       | I can't remember - did the aboriginal man one get debunked?
       | 
       | Stride length, and on mud, was longer than Bolt - implying faster
       | than the 100m WR on an awful surface?
       | 
       | https://www.scotsman.com/news/world/prehistoric-man-faster-t...
        
       | Noumenon72 wrote:
       | > Elite sprinters can apply peak forces of 800-1000 pounds
       | (3560-4450 Newtons) to each limb. Beyond ~1300 pounds, ideal
       | human leg bones would surely break[1].
       | 
       | I followed the link and it just said
       | 
       | > If you're looking for the specifics to snap a piece of your
       | skeleton, it takes about 4,000 newtons of force to break the
       | typical human femur.
       | 
       | So the sprinters are already producing that much force (900
       | pounds) and the 1300 notion seems unsupported. Not to mention
       | that applying the force with different amounts of torque might
       | not break the bone, since bones are 10x stronger in compression
       | so can withstand a lot more force longitudinally.
       | 
       | 1: https://www.discovery.com/science/force-to-break-bone
        
         | monsieurbanana wrote:
         | I can't access the discovery link from europe.
         | 
         | From your quotes, there seems to be an important difference: in
         | the first quote they talk about "ideal human leg bones" and in
         | the second one about a "typical human femur".
         | 
         | I'm certain that an elite sprinter blessed in genetics has leg
         | bones significantly stronger than the average human. Bones also
         | get stronger from repetitive exercise.
        
           | Someone wrote:
           | I would guess there also may be a difference between the two
           | cases in that the force needed to break a leg wasn't measured
           | by compressing it, but by exerting force perpendicular to its
           | length.
           | 
           | Even if it isn't, there are so many ways to measure breaking
           | strength that it's unlikely the two cases are perfectly
           | comparable.
        
             | silisili wrote:
             | This was my assumption. The original article implies
             | parallel force, which I imagine is far higher than
             | perpendicular. Eg trying to chop a 1x4 in half long ways
             | probably takes quite a bit of force(and a touch of
             | stupidity).
        
           | WalterBright wrote:
           | Your bones get stronger when regularly stressed. Bone is
           | added on the inside, not the outside, so you won't notice it.
           | 
           | I recall reading once that a pitcher's right arm had quite a
           | bit more bone in it than his left.
        
         | 1-more wrote:
         | For a bit of scale on what we know the human leg can handle
         | without breaking: the best drug tested, sleeves-only squat in
         | the world is 490 kg (Ray Williams IPF Worlds 2019). Drop the
         | drug testing and add multi-ply squat suits and the record is
         | 590 kg (Nathan Baptist, UPA Utah Kick Off Meet 2021). Granted:
         | these are two-footed squats and you run with one leg at a time.
        
           | DebtDeflation wrote:
           | Alternatively, look at Olympic weightlifting. While the
           | weights used in the clean and jerk and snatch are less that
           | used in the squat in powerlifting, the instantaneous forces
           | are much greater. I don't think 1300 lbs is anywhere near
           | enough to break a human femur if we're talking compressive
           | forces, lateral force is a different story.
        
             | bob1029 wrote:
             | Olympic-style lifts are among the most powerful things a
             | human can do. Elite athletes can push beyond 5kW at the
             | peak of exertion. This is why technique is so important.
             | The forces involved are insane once you go beyond 200lbs or
             | so. The snatch can be extremely troublesome if you do it
             | wrong. Clean and jerk is more tolerant to bad form.
        
               | 1-more wrote:
               | oooh yeah the speed is definitely something to consider
               | for them. Hmm. Kinda wanna grab some hookgrip slow-mo
               | edits and do JV science with them. Kinda don't because I
               | have shareholder value to create.
        
           | normie3000 wrote:
           | And could you add Baptist's weight to that? He is probably
           | more than 150kg.
        
             | 1-more wrote:
             | hahah dog he weighed 226.5kg.
             | https://www.openpowerlifting.org/m/upa/2104#nathanbaptist
             | 
             | Ray Williams weighed 190.4kg for his
             | https://www.openpowerlifting.org/m/usapl/2019-03-02
             | 
             | Also so sorry, I got the meet wrong but the year right. It
             | was the 2019 USAPL Arnold SBD Pro American
        
           | tomxor wrote:
           | Not to down play the "what's possible", but it's important to
           | note that bone strength depends on stimulus and nutrition
           | just as much as muscular and connective tissue strength.
           | Those athletes bones are likely far stronger than the average
           | human of the same size without training.
        
             | 1-more wrote:
             | Oh yeah, in fact Gene Rychlak (first lifter to bench over
             | 1000lb) said he could feel his bones bending during the
             | lift. Training is getting your body adapted to the
             | movement, and that for sure includes bone density. I'm
             | guessing our 100m runners are also pretty dense.
        
         | xattt wrote:
         | Tendons may be the limiting factor here. They are soft tissue
         | that has an elastic limit that is likely to be lower than solid
         | non-deformable bone. Exceed that and tendons will either tear
         | or pathologically lengthen.
        
         | happyopossum wrote:
         | Worth noting that the femur is the strongest bone in the human
         | leg...
        
       | MisterBastahrd wrote:
       | What I want to see is an olympic sprinting event where the first
       | 20 meters are dry land and the last 80 are a non-newtonian fluid.
        
         | bregma wrote:
         | That would also be great for gymnastics. And swimming. And
         | especially tower diving.
        
           | SketchySeaBeast wrote:
           | You had me in the first half.
        
         | hanniabu wrote:
         | Sounds like a great way to break an ankle
        
       | nothrowaways wrote:
       | > However, anatomical studies suggest peak speeds up to 15.6-17.9
       | m/s (35-40 mph) are achievable.
        
       | moate wrote:
       | So we have 2 different theses being posited by this article. The
       | headline (how fast for 100 meters) and the whole rest of the
       | article (how fast for 100 meters under racing rules).
       | 
       | Just saying, these are different things.
        
       | gadders wrote:
       | Obligatory link to article discussing whether Usain was on PEDs
       | or not:
       | 
       | "When people ask me about Bolt, I say he could be the greatest
       | athlete of all time. But for someone to run 10.03 one year and
       | 9.69 the next, if you don't question that in a sport that has the
       | reputation it has right now, you're a fool. Period." Carl Lewis
       | 
       | https://archive.ph/R6DOs#selection-553.0-553.255
        
       | htrp wrote:
       | > One Australian physiologist calculated in 2014 that a sprinter
       | with Bolt's force could maintain it while also cutting contact
       | time with the ground to just 70 milliseconds (down from 80 or
       | so). This would result in a top speed of 12.75 meters per second,
       | or 28.53mph - and a new world record of 9.27 seconds.
       | 
       | https://www.theguardian.com/lifeandstyle/2016/oct/03/how-fas...
       | 
       | -------------------------------
       | 
       | A more realistic assessment
        
       | EA wrote:
       | BTW: if you are looking for something to latch onto with the
       | Olympics starting this week, the USA vs Jamaica rivalry in the
       | short distance trace events is a great David vs. Goliath story.
       | The two countries have been battling back and forth with each
       | other for the top spots for the last decade or longer. The
       | runners have flamboyant personalities and these are some of the
       | fastest sprinters we have ever seen; both men and women. There is
       | a documentary on Netflix called 'Sprint' that sets the stage for
       | this Olympics.
        
         | ericmcer wrote:
         | I wish that show had focused a bit more on technique/training
         | and less on personality, but it was super entertaining
         | regardless.
        
       | aantix wrote:
       | There's a famous trainer, Ryan Flaherty. He gets guys ready for
       | the NFL combine.
       | 
       | He utilizes the hex-bar deadlift.
       | 
       | He has his football athletes complete the concentric phase
       | (picking up from the ground) as fast as possible.
       | 
       | They just drop the weight when they reach full extension at the
       | top.
       | 
       | He claims that the eccentric phase (lowering) is when all of the
       | micro-muscle tears occur. These tears cause muscle growth.
       | 
       | By dropping the hex-bar deadlift weight at the top, instead of
       | lowering, you get most of the strength gain, without the muscle
       | size growth.
       | 
       | This is an effort to increase leg strength (for speed) without
       | adding additional body weight.
       | 
       | Getting faster by getting stronger but staying lighter.
        
         | thrownblown wrote:
         | working at gym after 4 Hour Body came out was pretty loud...
        
         | pstorm wrote:
         | I've recently come to believe the differences in hypertrophy
         | are negligible between eccentric and concentric focused
         | movements, but can't find any recent, compelling research that
         | says so. There was a 2017 meta analysis by Brad Schoenfeld
         | (basically THE hypertrophy researcher) that showed a pretty
         | significant different in hypertrophy: an average of 10% vs
         | 6.8%.
         | 
         | I know Greg Nuckols from StrongerByScience believes this is
         | mostly caused by lifters, especially untrained lifters which
         | most of the research is on, having spent less time in eccentric
         | phases so there is more opportunity for growth there, but it
         | will eventually plateau.
        
       | log101 wrote:
       | Please don't do it, this will surely limit out potential!
        
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