Primary Muscle Group: Gluteus Maximus

Muscle Groups Worked in This Exercise: Gluteus Maximus, Quadriceps (Rectus femoris, vastus lateralis, vastus medialis and vastus intermedius)

Preparation: Begin by standing just in front of the ball and place your left shin on top. Place your hands on your hips.

Breathing: Inhale as you bend your leg; exhale as you come back to standing.