Lie on your back with your stomach pulled in tightly, back flat on the floor.

Place your right ankle on your left knee.

Place your left hand behind your head, keeping your neck relaxed and straight.

Your right arm can be at your side, providing support.

Contract your abdominals and lift your shoulders off the ground, keeping your head supported. Move your left elbow towards your right knee.

Hold the abdominal contraction for 5 seconds, then lower slowly to the starting position.

Repeat for the other side.

- Don't arch your back.

- Keep your lower back pressed firmly against the floor.

- Don't ever attempt this exercise with relaxed stomach muscles. Keep your stomach muscles contracted.