Tutti i Forum  Voce dell'Etna  Libero Pensiero  damn terrible if you want to run a

Nota: Devi essere registrato per poter inserire un messaggio.
Per registrarti, clicca qui. La Registrazione è semplice e gratuita!

Larghezza finestra: 640 x 480 800 x 600 1024 x 768 1280 x 1024 Nome Utente: Password: Modo: Base  Aiuto  Finestra  Formato: Carattere Andale Mono Arial Arial Black Book Antiqua Century Gothic Comic Sans MS Courier New Georgia Impact Lucida Console Script MT Bold Stencil Tahoma Times New Roman Trebuchet MS Verdana   Grandezza 1 2 3 4 5 6   Colore Nero Rosso Giallo Rosa Verde Arancione Viola Blu Beige Bordò Verde Oliva Blu Marino Marrone Verde Limone Icona Messaggio:                             Messaggio:   * Il codice HTML è OFF * Il Codice Forum è ON Faccine Seleziona altre faccine [quote]Messaggio di Labi1995 [br]Nice to see the two videos of [url=http://www.artealjabiri.de/]www.artealjabiri.de[/url] sprinting and jogging alongside each other. A couple of observations:What is apparent for all the [url=http://www.matthieugranier.fr/adidas-c-93/adidas-zx-700-femme-c-93_114/]Adidas ZX 700 Femme[/url] sprinters that the maximum extension forward and backward is in the air, with the time on stance a subset of the time that foot is moving backwards. Ideally one would be able to slow the foot down completely on landing so no momentum is lost on landing, to achieve this one has to slow the foot down from 10m/s at the point of furthest extension to 0m/s by landing – this will require a heft deceleration of the foot and lower leg. This is pawback, but it’s not an attempt at generating force on landing, instead it’s just done to avoid the foot contacting the ground with forward speed.The same applies to the foot on toe off, but going from 0m/s to 10m/s very quickly as the foot is pulled forward by the body and then swung up to the butt [url=http://www.lavolailles.fr/Nike-Air-Max-TN-Femme-c-48_49.html]Nike Air Max TN Femme[/url] under it’s own momentum.How much is passive and active forces controlling these changes in [url=http://www.goulvenbazire.fr/Nike-Air-Max-97-Femme-c-34_35.html]Nike Air Max 97 Femme[/url] velocity of the foot I can’t say. What I would venture a guess at is the the faster one goes the smaller the subset of time and distance on stance relative to the full extension will need to be. One can see the opposite end of the spectrum with the jogging video – there is very little time in air where the foot is being slowed down for landing and very little time where the foot is being accelerated forward. Here the range of extension pretty well matches the distance on stance.One thing that was surprised by with the two videos in the sprint all the runners aren’t noticeable moving up and down very much – they large seem to be just moving horizontally. They will of course have a vertical oscillation but I’d guess that the cadence is so [url=http://www.amolan.es/Nike-Air-Max-90-Mujer-c-23_40.html]Nike Air Max 90 Mujer[/url] high that the oscillation is very small. This contrasts to the jogging video where Usain [url=http://www.amolan.es/Adidas-Superstar-Hombre-c-1_6.html]Adidas Superstar Hombre[/url] looks to be bouncing along with a relatively large vertical component relative to the horizontal movement. I would guess this bouncy jogging gait is partly down to the much slower cadence, but also down to the relative stiffness of the lower leg which allow Usian to utilize a good amount of elastic recoil. If he is about to sprint, or has just finished sprinting then I’d expect him to be primed for sprinting with the stiffness associated with it.I would expect a distance athlete to run with less stiffness, so the jogging gait would be less bouncy. I would also wonder if a distance athlete might have a higher cadence at lower speeds than a sprinter.One thing I think most of us are failing to bring into light is the idea of what does usain bolt train in…. I must say I doubt he spends much time in a pair of 15oz 1 inch thick [url=http://www.goulvenbazire.fr/]www.goulvenbazire.fr[/url] trainers… From my experience and observations it seems that most sprinters do their workouts in spikes. Have you ever tried to land on your hills in a pair of sprint spikes… You just don’t do it…. Just like your gait will change in a minimalist/barefoot form your form will change depending on what you train in… He probablly never landed on his heels just because of his footware… Then he got trained to be even more efficient and faster at it… In America we run in this thick shoes that allow us to land on our heel so we get used to this and then this proper sprinting form must be taught.The first are of the my dick is bigger than your variety. Saying you can beat Bolt in any distance is simply pathetic. He is the best at what he does, you are not.does. Don’t bother, he is the best at what he does are you are not. His “slow jog” [url=http://www.artealjabiri.de/Nike-Air-Span-2-Herren-c-127_129.html]Nike Air Span 2 Herren[/url] form is great when you are a sprinter doing a slow jog, but damn terrible if you want to run a 10K [url=http://www.amolan.es/]www.amolan.es[/url] or more (Don’t even begin to think you can beat Usain Bolt in a 5K…if you think you might be able to, you can’t. You would know if you could.). While his foot lands in the proper place in the slow jog, his heal doesn’t come down enough to absorb much shock. Even worse he is springing up all over the place. There is so much wasted energy pushing his body up instead of forward! If you thing that looks good for distance running, be prepared for sore calves, injuries, and slow times.That being said, if you asked him to run a 10K, he would beat about 97% of people who run 10Ks regularly. I guarantee his form would naturally adjust to the speed and he would not be bouncing 4 or 5 inches skyward each step. [/quote]    Allega file   Clicca qui per inserire la tua firma nel messaggio.