Balance Trainer Crunch

How to do it

1. Place a balance trainer (such as a BOSU ball) flat side down on the floor. Sit on the dome and walk your feet forward until your lower back is resting on the dome. Cross your arms over your chest or place your hands lightly behind your head. This will be your starting position.
2. As you exhale, contract your abdominals and curl your torso forward, lifting your shoulders off the dome. Tip: The curve of the balance trainer allows for a greater range of motion than a floor crunch, so use it to your advantage by stretching back fully.
3. Hold the contracted position for a second and squeeze your abdominals.
4. Slowly lower yourself back to the starting position as you breathe in.
5. Repeat for the recommended amount of repetitions.