Weighted Overhead Crunch (On Stability Ball)

Instructions

1. Sit on a stability ball and walk your feet forward until your lower back is supported by the ball.
2. Hold a weight plate or dumbbell overhead with arms extended.
3. Lower your torso back into a slight arch, then crunch upward, keeping arms overhead.
4. Pause at the top, then lower back with control.
5. Repeat for the prescribed reps.