I like how My Many years experience he told us in 2-3 mins video :) that's why i love science too ✨

Keeping you elbows at 90° at all times it's incorrect. There are no elite sprinters that do this.

The arm should get straighten during the lower part of the swing and recover the 90 degrees bend on the back of the swing. "Thumbs to the eye, elbows to the sky" - Carl Lewis

Loving the sprinting biomechanics video. Have you heard of the two-body model by CMU. I would love for you to do a video related to that.

Arm movement Pocket to Chin elbow 90 degrees.

Doesn't explain how arms generate force though or why the legs follow the pace of the arm

love the sprinting vids

I love this sprinting videos

Sir I couldn't understand the concept of centrifugal that you used in this video?

1:08 Abby Steiner?

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Keeping the angel constantly at 90 degree is so dated. Only one (I'm sure there's more) running like that in recent years that I can recall was the stiff Justin Gatlin. Your first sprinting video was pretty good though. Had hoped this one would be more about rotational movement, mobility etc.

You're new to this aren't you? Your explanation is at least 30 years out of date. Arms do way more than control your torsion. They help apply more force into the ground which in turn help you run faster because you get better elastic return from the ground. You DO extend the elbow downwards to facilitate this. Sprinting is way more complex than you think my friend.