This exercise provided courtesy of Mike Clausen, founder and co-owner of DIAKADI Body training gym, voted best personal training gym in San Francisco by CitySearch in 2006.
Train your abs and entire core as you move the weight of a medicine ball from side to side while holding your body piked in a core-busting 45-degree V position.
Sit near the edge of a flat bench or box platform. Lean back with your hips piked at a 45-degree angle with your legs extended out and knees slightly bent. Hold an 8- to 10-pound medicine ball out directly in front of you with your hands holding the sides of the ball and your elbows slightly bent (see Photo 1).
- From the starting position, keep your arms held out in the same position as you engage your core and twist your upper torso in a smooth motion, first to the left side. As your upper torso twists, your arms and the medicine ball should follow it (See Photos 2 and 3).
- Twist as far as you can while maintaining the v-hold position, and then reverse direction and return toward the starting position (see Photo 4).
- Without pausing at the center, twist your upper torso to your right side, and then back toward the starting position. You have completed one rep when you have twisted to both sides.