Swiss Ball Jackknife
- Primary muscles
- Abs
- Secondary muscles
- Quads
- Equipment
- Stability ball
- Movement pattern
- None
Steps
- 1 Begin in a plank position with your hands on the floor directly under your shoulders and your shins resting on a stability ball.
- 2 Engage your core and flex your hips and knees, rolling the stability ball towards your chest.
- 3 Slowly extend your hips and knees, rolling the stability ball back to the starting plank position.
