Instructions:

1. Stand facing a wall with your feet shoulder-width apart.
2. Place an exercise ball between the wall and your lower back.
3. Hold a dumbbell in each hand, with your arms extended by your sides.
4. Place a tennis ball between your ankles.
5. Raise your heels off the ground, lifting your body up onto your toes.
6. Pause for a moment at the top, then slowly lower your heels back down to the starting position.
7. Repeat for the desired number of repetitions.