Bolt's 9.58 in Slow Motion

[James_Smith]

@stilljd_5

Is there any advantage of bending the knee past the equalateral triangle equivelant.

Well, once the upright position is assumed the higher the heel recovery the shorter the lever and theoretically the shorter the recovery/swing phase in general. Assuming power output and mobility is in place, stride length is covered and the faster recovery cycle coincides with frequency.

I’m not sure that I would cue such a thing; however, one thing I first noticed about Powell’s, in particular, upright running was his seemingly minimal backside leg mechanics- high heel recovery and beautiful stepping down action.

[stilljd_5]

@James_Smith

Well, once the upright position is assumed the higher the heel recovery the shorter the lever and theoretically the shorter the recovery/swing phase in general. Assuming power output and mobility is in place, stride length is covered and the faster recovery cycle coincides with frequency.

I’m not sure that I would cue such a thing; however, one thing I first noticed about Powell’s, in particular, upright running was his seemingly minimal backside leg mechanics- high heel recovery and beautiful stepping down action.

My background is more in the mechanical/construction side, building power stations etc. I also spent a lot of freetime reading books and watching anything I could associated with human movement.

I cannot gasp the concept that past the point of equilibrium with the knee that a higher heel raise will be faster or more efficient given the extra time/energy required for the extra movement. If Usain was mechanical I would say he is efficent primilarily because he seems to have a more efficient exhaust/recovery cycle.

[James_Smith]

@stilljd_5

My background is more in the mechanical/construction side, building power stations etc. I also spent a lot of freetime reading books and watching anything I could associated with human movement.

I cannot gasp the concept that past the point of equilibrium with the knee that a higher heel raise will be faster or more efficient given the extra time/energy required for the extra movement. If Usain was mechanical I would say he is efficent primilarily because he seems to have a more efficient exhaust/recovery cycle.

The problem is quantitatively/qualitatively determing what you’re describing as equilibrium from one sprinter to the next.

Lever lengths, tissue attachment points, and power outputs would all effect the degree of knee bend during recovery from one sprinter to the next.

Interesting to discuss, however.

It obviously makes sense to only address mechanical issues with sprinters that are clearly inhibiting their full potential from being realized.

[lr1400]

@JasonUK

No problems

Things they worked on with me personally was the ‘sprinters lean’ I worked on this with Blake a few times a week. No real cues just when you bring the head up from accel keep the chin in slightly and make the upright transition smooth…dont rush to see the track. Hands to chin and strike down. Blake’s ability to hold the sprint position was unreal. Relaxed in the face…stepping over and down.

I saw and heard a few 200m cues too. The main one was with regards to turning the shoulder (the right shoulder) towards the straight away while running the curve (if that makes any sense) with a slight lean in towards the inside part of the lane. I remember Ato saying something similar on the HSI documentaries.

Watching them train is far better than watching a one of race…you get to see the movements over and over again.

Thanks!

The sprinters lean…more from Bud Winter.

I notice on film they all really focus on “hammering” down. Watching any vid of Bolt and Asafa warm up you can see them doing this very hard even in their warm up strides.

Personally, Blake has great top speed running form. That dude is gonna be bad.