Does it matter if the figure of eight runs 100 meter?

I don't know what I think on the first floor and the second floor.

There may be a misunderstanding here.

In basketball, if you want to jump high with your feet (such as rebounding), you usually buckle your knees, not your feet.

Running is different. 100 meter race, except at the start, because pushing the ground to both sides will be a bit inside. It is impossible to run and sprint on the way.

Because the inner character will affect the direction of your feet, which is a very bad habit.