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Thread: Asafa slow motion block start

  1. #1
    Member Chris6878's Avatar
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    Asafa slow motion block start


  2. #2

    Re: Asafa slow motion block start

    Dragging his feet too much, probably one of the reason he gets run down late.

  3. #3

    Re: Asafa slow motion block start

    Quote Originally Posted by Sharmer View Post
    Dragging his feet too much, probably one of the reason he gets run down late.
    Care to elaborate? He has been one of the best starters in the world for most of his career. How does his shuffling type of initial steps change what happens late?

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    Member sady's Avatar
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    Re: Asafa slow motion block start

    He starts extremely well and changes technique twice more. If he dragged his feet for the whole race he would be quicker.

  5. #5

    Re: Asafa slow motion block start

    Interesting to see that at 5 seconds he lets his heels come up, but by 6 seconds he has them back at his knees (almost like he was executing a form of dribbling)

  6. #6
    Member Chris6878's Avatar
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    Re: Asafa slow motion block start

    He dragged for the first 3 steps then he started stepping over the knee. Great extension from beginning to end. Getting complete foot placement on each step. Looks good to me.
    In asafas last race in Jamaica he didn't do his traditional foot drag at all.

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    Re: Asafa slow motion block start

    Looks pretty good to me. Appears to drag for the first 3 strides, then seems like he takes a few strides with the shin no higher than knee length, until he continues to tuck them higher until he approaches higher speeds. Only thing I might say about him is that his ankle/foot tends to land a bit ahead of his hip a bit early, I think this becomes true once he gets to his 5th stride here. Of course, I believe Jeter has the same tendency. Works for them though obviously.

  8. #8

    Re: Asafa slow motion block start

    Quote Originally Posted by rainy.here View Post
    Care to elaborate? He has been one of the best starters in the world for most of his career. How does his shuffling type of initial steps change what happens late?
    Its just not efficient because of greater breaking impulse, the cost is less efficiency late in the race. Ben was technically a much better starter. In 20-30 years with the benefit of hindsight coaches/sport scientist will look back at the toe drag technique and it will be viewed as nonsensical.

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    Re: Asafa slow motion block start

    Quote Originally Posted by Sharmer View Post
    Its just not efficient because of greater breaking impulse, the cost is less efficiency late in the race. Ben was technically a much better starter. In 20-30 years with the benefit of hindsight coaches/sport scientist will look back at the toe drag technique and it will be viewed as nonsensical.
    While it's certainly debatable as to whether it is a point of direct instruction or avoidance, the undebatable physics are such that the predominance of horizontal forces during block clearance and initial acceleration create a situation in which the exaggerated curvilinear path through space manifested by higher heel recovery (while a mechanical advantage in the vertical sprint position due to the shorter lever arm) is a longer path/duration in comparison to the toe drag in which the lever is longer yet the path through space is shorter.

    Breaking impulse is substantially more affected via where ground contact occurs in relation to the hips. While there is an increased friction component as the toe drags, this is offset by decreased duration of the recovery cycle (during block clearance and initial acceleration).

    That said, I'm not one to say "you should do this or that with the recovery leg during block clearance"; rather, optimize what is already being done. It is fundamental to acknowledge the physics, however.

  10. #10
    Member Chris6878's Avatar
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    Re: Asafa slow motion block start

    Quote Originally Posted by Sharmer View Post
    Its just not efficient because of greater breaking impulse, the cost is less efficiency late in the race. Ben was technically a much better starter. In 20-30 years with the benefit of hindsight coaches/sport scientist will look back at the toe drag technique and it will be viewed as nonsensical.

    the 2 races ive seen from him this year, he has not toe dragged at all

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