How to do it
Squeeze your glutes and quads tight to hold a rigid body line.
- 1
Assume a plank position with your forearms on the stability ball.
- 2
Engage your core and push your body back and forth using your forearms.
- 3
Keep your body in a straight line from head to heels.
- 4
Repeat the sawing motion for the desired number of repetitions.
Expert tip
Maintain a strong plank position throughout the exercise to maximize core engagement.
Common mistakes
- ✕Sagging the hips toward the floor
- ✕Guiding the ball with hands not forearms
- ✕Jerking the torso in sharp thrusts