Place your left foot on a chair and lean forward, hinging at the pelvis (don't bend the low back) until you feel a gentle hamstring stretch. Keep both knees slightly bent. With both hands, reach out and down toward the stretched leg, then rotate your torso, reaching up to the ceiling. You'll feel a slight ab stretch. To finish the motion, sweep the hands down to the opposite side of the leg, holding the ham stretch throughout. Do two sets of 12 reps on each side.