Purpose: This exercise helps to strengthen your abdominal muscles, specifically your obliques, and your shoulder and back muscles. This is a great exercise for throwing and stick sports, and it helps to improve your posture when performed correctly.
How to do it:
* Lie on your side.
* Lift up onto your elbow and one foot trying to keep your hips parallel to the ground and your stomach tightened.
* Hold this position for at least 15-20 seconds before returning to the ground and switching to the other side.