Adding the punch to this ab exercise will actually make you twist more so your abs work even more!
- Sit on the ground with your knees bent and your heels about a foot and a half from your butt. Lean slightly back, and lift your feet a few inches off the ground without rounding your spine.
- Twist your torso to the left, punching with your right arm. This completes one rep. Twist to the right and punch with the left arm, and continue alternating sides.