Bilateral lower limb flexion/extension on a stability ball ("Hamstring curl on ball" Core stabilization, with pelvic tilt; 04)

Bilateral lower limb flexion/extension on a stability ball ("Hamstring curl on ball" Core stabilization, with pelvic tilt; 04)

Lie on your back with your legs on a stability ball.
Tighten your abdominal muscles.
Roll the ball in towards your buttocks and then roll it away from you, straightening out your legs as you do so.
Continue this movement at a steady speed.
Your tail bone may roll off the floor a little as you roll the ball in.

Required equipment: Stability Ball, Mat, Ball - large
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