Yearlong (Ph X-A, W III)
Sets: As many as needed Reps: 100
Lie on the floor, bend your knees 90 degrees, and plant your feet flat. Tuck your chin slightly toward your chest. Raise your torso off the floor and toward your thighs as far as you can. Perform 100 total reps, doing as many sets as you need to (and resting as needed in between) until you hit that number.