The jump squat will work explosive power in the quads, glutes, hamstrings, and calves. The lower back will also be used.
Stand with your feet shoulder width, or slightly outside of shoulder width. To begin the movement, take a deep breath in and brace your abdominals hard. As you lower your body, break at the knees and hips at the same time, keeping your upper body upright. Once you reach the bottom of the squat, explode up launching yourself into the air. Make sure to land as softly as you can, and immediately sink into another squat and repeat.