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 with the ball on your right side. Rest your hand on top and take a big step forward with your left leg.
Breathing: Inhale as you bend, exhale as you straighten your leg.
Execution: As you bend your left knee, inhale and sink down into the lunge. As you rise to the starting position, exhale. Switch sides after finishing all reps.
Comments: This exercise not only improves your balance and coordination, but tones your hips, thighs AND buttocks.