Medicine Ball Throw
Hold a 5-to 8-pound weighted ball while you start in a standing position. As you squat down, engage your abdominals and toss the medicine ball up above your head. As you come up from the squatting position, catch the weighted ball. Return to starting position and repeat 20 reps, 2-4 sets.
Crunches on Small Ball
Start by sitting on a mat, and place a small weighted ball on your lower back. Raise your hips, and bring your arms behind your head or across your chest. Lower as far as you can on the weight ball and come up as high as you can. Return to starting position, and repeat for 20 reps, 2-4 sets.
All Fours Arabesque
Get on all fours with the top of the feet on the mat. Bring right knee behind left leg, then lower onto left forearm as you extend the right leg at a diagonal behind you. Return to starting position and repeat 20 reps on each side, 2-4 sets.