Question

You can perform these two jumps (Fig.):

Straight-leg jump - keep knees and ankles stiff.

Normal jump - bend knees and ankles naturally.

How did your ankle, knee and hip positions differ between the two jumps?

Answer 1

Straight-leg jumps need little or no bending since the ankle, knee, and hip joints are tight. Ankles, knees, and hips bend normally in a typical jump. They absorb shock, preserve balance, and improve jump height and movement.