Tighter-abs workout

Rotational Lunge

Holding a medicine ball at your waist, stand with your feet hip-width apart. Step your left foot diagonally behind you. Lift your right heel off the floor and turn to face your left knee, resulting in a lunge. Simultaneously bring the ball across your body in front of your right shoulder. Return to the starting position and repeat on the opposite side. Continue alternating for two sets of 10 to 12.