Squat until your thighs ... above your right shoulder and crunch your upper body to the right (B). Return to start. Do 12 to 15 reps, then repeat on the other side. That's one set.

doing a side crunch. Straighten your spine as you bring your right foot to the floor, and bend both knees, coming into a sumo squat. This completes one rep. Begin standing with all your weight on ...