Yearlong (Ph X-B, W II)
Sets: As many as needed Reps: 100
Lie on your back with your legs raised 90 degrees and knees straight. Keeping your back on the floor, rotate your hips so that your legs touch the floor to your right side, and then the left. Perform 100 total reps, doing as many sets as you need to (and resting as needed in between) until you hit that number.