Andrew Huberman· PhD
the difference here is when you're striding it's essentially a a pretty simple traditional spring Mass system the body acts as a spring just whether it's 50% on the front side 50% on the back side you hit and you bounce off you hit and you bounce off where sprinting is a little bit different this is the work of Dr Ken Clark who's a good friend of mine that he he uh published this in I think in 201 uh 189 it's called a two Mass system where it's the body is not acting as a spring there's a secondary mass of the shank and the foot that's contributing to up to about 8% of the total Force Through contact so this Elite Sprinter is hitting the ground so hard that so there's another Mass that's added to the spring and that's what I'm saying that's not available to you because you can't move your limbs fast enough and you don't have the range of motion that's big enough to be able to get that sort of velocity