First, thank you Christopher for the video.
The less vertical displacement the better. You have to remember that vertical displacement happens in to directions upwards and downwards.
Yes, but why can’t I see it in this sprinter, who, since he’s beating Bolt to 60m, is probably an elite sprinter. Where is this vertical displacement occuring, because I cannot see it in his head or torso.
The more vertical displacement you can actually see the slower the sprinter…..So to sum it up faster sprinters have great upward displacement but most importantly the have less down ward displacement which is why the hips/head stays at the same plain.
I don’t understand. Vertical displacement is occuring but because he is an elite sprinter you can’t see or measure it? If you don’t see it and can’t measure it, it doesn’t exist, does it? Displacement, by definition, is “the distance measured in a particular direction from a reference point”. I cannot measure any displacement here, therefore there is no displacement. At least that I can see and that can be measured. If it exists, where is the displacement occuring? Aren’t we talking about the torso, the main body of mass, being displaced? I can’t see that it is being displaced in the vertical at all.
Get the hips up and stay up instead of collapsing and bouncing up and down…
I this is the case, then again there is no vertical displacement after the first stride or so. In other words, if you stay up and don’t bounce up and down, as you say, displacement ceases and vertical displacement no longer takes place. If there is vertical displacement, by definition, you can’t stay up, you must go up and down.