exercise ball on the wall calf raise (tennis ball between ankles)

Stand facing a wall with your feet shoulder-width apart.

Place an exercise ball between the wall and your lower back.

Hold a dumbbell in each hand, with your arms extended by your sides.

Place a tennis ball between your ankles.

Raise your heels off the ground, lifting your body up onto your toes.

Pause for a moment at the top, then slowly lower your heels back down to the starting position.

Repeat for the desired number of repetitions.