Reverse Crunch 

Starting Position 
Lie on the floor or a mat on your back, with knees bent and hands behind head. Lift legs and bend knees to 90 degrees. Keep a space between your chin and chest (looking diagonal towards the ceiling). 

Action 
EXHALE: Pull knees in toward chest and hold for 2 seconds. 

INHALE: Slowly lower legs back to starting position. 

Special Instructions 
Don't use your momentum to swing your legs up. Try to keep the motion controlled by your abs.

Muscles Worked: Abs