Move from your waist. Whenever you twist, make sure the movement happens from your bottom rib up. Keep hips still. •Tighten up. Throughout each move, you should feel a tightening, similar to zipping up a pair of tight jeans, from one hip bone to the other.
•Exhale deeply. To help strengthen your abs and protect your lower back, be sure to exhale thoroughly with every breath.
Hold a 5-pound medicine ball (or dumbbell) between both hands. Swivel left to right and back, bringing ball across body while maintaining the V shape.
Lie faceup with your left knee bent, left foot flat on the floor, and right leg extended toward the ceiling. Reach toward the ceiling with your the left arm and keep your right arm down by your side.
Without moving your hips or shoulders, open your raised leg to the right and raised arm to the left. Now, concentrating on your abs, return your raised leg and arm to the center. Do 10–12 reps, then switch sides and repeat.