Front/Left/Right Medicine Ball Toss
Lie on the ground with your heels digging into the ground. Have a partner throw a medicine ball directly to you. Bring the medicine ball back behind your head, Then perform a normal crunch and throw the ball back to your partner. Then have a partner throw the ball to your right side.Catch the ball, bring it behind your head to the right, and crunch up to your left side and throw the ball back. Repeat to the left side and crunch up to the right.