Achilles Tendon Length and Jumping: Holm vs. Thomas
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- Опубликовано: 1 окт 2024
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I took some clips from the Holm vs. Thomas sport science documentary and coupled with recent research by Earp in the Journal of Strength and Conditioning research (2011) made this short video showing how the length of the Achilles Tendon influences knee bend and ground contact times in single leg jumping.
Typically, athletes with shorter Achilles tendons will be better at jumps from a running start, relatively speaking, but their standing verticals will be poor compared to their long tendoned counterparts.
Athletes with longer Achilles tendons will excel and standing and short approach jumps, but will be at a slight disadvantage when it comes to fast running jumps. This doesn't mean that they can't be good at it, however, they will just end up doing it with slightly different Biomechanics.
In short: Long Achilles tendons = better standing vertical jumps, and more knee bend on running jumps to jump high. Longer contact times. Short Achilles tendons = better running jumps, particularly off of one leg.
Relevant research: Earp, J. E., R. U. Newton, P. Cormie, and Kraemer J. W. "The Influence of Muscle-Tendon Unit Structure on Rate of Force Development, During the Squat, Countermovement, and Depth Drop Jumps." Journal of Strength and Conditioning Research 25 (2011). Web.
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Joel, I don't know if you noticed, the skeleton explanation animation is wrong, in the real example, both jumpers don't dorsiflex, the knee never went over 90 degree, while the animation dorsiflexed passed over 90 degrees, in this mode quad is being used instead of glutes. also Holm's feet's contact point is to the side instead of the front vs Thomas.
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very interesting, i actually thought it was the opposite way and that athletes with longer achilles were better off the run, makes sense now though. couldn't tell from the vid the number for holm's achilles measurement length?? thanks for uploading
this again is bullshit , springs do not work like tendons/sinew , sick of it .If any of you people want to learn i will show just ask.
Chris Dealny Show me then
Chong Chong is correct, the 3D animation does not representing accurately the jumper´s technique. On the slow mo it is clearly shown that, unlike the 3D animation, both jumper´s tibial/fibula never cross over the perpendicular point during support and therefore no dorsiflexion at the ankle occurs.
On the 3D animation the tibia/fibula is being shown at an approximative 45° angle which subsequently force the ankle to dorsiflex. That cause me to think that the author of the animation is clearly focused on his point of comparing tendons length and did not pay attention to the whole technique.
So I'm 5"9.5. Does that mean I should find a medium or something?
Stefan holm is 5''9.3
there is no way to lengthen your genetic limb lengths, so the most alternative to jump is increasing the strength through muscle recruitment and gain while keeping or increasing rate of force.
I watched the video and read all the comments. You are all talking about minor things. Nobody said the main thing.
WHAT ABOUT AVERAGE SIZE ACHILLES
Has nothing to do with tendons and everything to do with limb length
The power doesn't all come from the glutes that he pivot from, look at the other foot and leg and glutes is doing....people are being mislead.
Manuel, thanks for the response. You are correct in the sense of tendon compliance being good for speed, but this is primarily in tendons which extend through a longer range of motion. I once thought this was the case for all tendons as well, and actually wrote an article for it, but after some controversy, spoke with Keitaro Kubo who does most of those studies on tendons. He said he actually wasn't sure that all tendons should be compliant rather than stiff. Recent studies confirm this.
well, good video but it is not just lenght but also stiffness. isn't it?
I'm not entirely confident of the 'science' here.
Im 182cm, my tendon is 22cm and i weigh 110 kg and i cant jump high at all. How can donald thomas who is 190cm with same ish tendon jump like 10 times my height?
First you are way to heavy for your height.
Then jumping is also about power generation from the quads
Lol, you fat brick. Thomad is light and athletic, you are fat.
Donald had a thicc tendon
@@JayzsMrJumping is about power generation from the GLUTES!
@@salj.5459every muscle is important but one leg is more glute dominant. That being said having strong quads and showing knee dominance is also viable for one leg jumping.
why do the athletes land on the side of their foot so extremely?
The effect of running a curve.
landing on the outside of the foot provides room and time... provides room for the foot to load as the body transitions over (loading the arches of the foot), it provides time to manage that collision with the ground so it is not an absolute sudden shock, each joint segment has the ability to deal with forces.
so is longer archillies benifitial for jumping higher or nah?
yes, the longer and thicker the better
i couldn't comprehend what you're saying. of course it's not everything. but glutes are are mostly the largest muscle group in the prime movers and when activated by dominant glute jumpers about 80% it's too powerful.
Intresting indeed! thank you very much for uploading
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