15-Minute Crunch-Free Ab Workout
(A) Stand with your back against the wall, feet in front of you. Place a playground ball or pillow between your knees. Inhale to expand your belly, then exhale and contract your abs. (B) Bend your knees and lower into a squat. Squeeze the ball with your thighs, drawing your abs even more deeply toward your spine. Do 20 squeezes; return to start.