Figure-Eight Crunch

Works all the abdominal muscles, strengthening your torso for twisting during running. This is also helpful for moves such as kicking a soccer ball and hitting a slap shot.

Cup your hands lightly over your ears, then slowly raise your head, shoulders, and feet off the floor. This is your starting position.

From the starting position, move your knees in a wide figure-eight motion (as seen if you were looking down from above).

Do three repetitions in one direction, then reverse the motion for three more repetitions.