A

Grab a medicine ball and try this move from New York trainer Marlowe Fisken, who demonstrates it above. By adding a leg lift to a side lunge, you'll work the muscles of your outer thighs and glutes. Plus, reaching to the side strengthens your obliques, which slims your waist. Replace your normal lunges with this and see sexy changes above and below the belt.

> Hold a medicine ball and stand with feet hip-width apart. Lunge to the right as you bend forward at the hips and lower the ball toward your right shin [A].

> Shift your weight to your left foot and stand, extending your right leg out to the side as you move the ball in an arc toward your left leg, out to your left side, and then overhead and to the right [B].

> Reverse the motion to return to starting position; repeat. Switch sides to complete set.

B