Lying Hamstring Curls with Ball 

Starting Position 
Lie on your stomach, squeezing a ball between your legs beneath your lknees. Place arms and hands under your head. 

Action 
EXHALE: Keep feet flexed and ball squeezed tightly. Curl your heels in towards your butt as far as possible.  

INHALE: Slowly lower to start without resting on the ground between reps. 

Special Instructions 
None. 

Muscles Worked: Hamstrings, Inner thigh