- PrimarySecondaryTertiary
- Difficulty
- Intermediate
- Force
- Pull
- Grips
- Neutral
- Mechanic
- Isolation
- Lie on your back, holding a stability ball between your feet, arms extended overhead.
- Engage your core, lift your legs and arms, passing the ball from feet to hands.
- Lower arms and legs back down, then repeat, passing the ball back to feet.