Use barbells and dumbbells to exercise gluteus maximus. Barbell Squat: Hold the barbell on the back shoulder, and hold both sides of the barbell with both hands to do squat, mainly practicing thigh muscles and gluteus maximus. Action: Hold the dumbbell with both hands and put it on one side of your body, or put the dumbbell slightly above your shoulders for smooth control. Feet naturally open about shoulder width, feet slightly open, chest out, waist and back tightened. Kneel down to the lowest position, and then tighten the thigh squat.