The Jack Knife

Starting Position

1. Lie on your back and raise your legs vertically.

2. Your arms support your body on the sides.

Proper Form

1. Lift your pelvis while swinging your legs behind your head.

2. Extend your legs towards the ceiling using your abdominal strength.

3. Lower your spine in order as you return.

Breathing Technique

Exhale when you go up, and inhale when you go down.