Muscle Building: Isolation Exercise - Squat Jump

Stand with your feet shoulder width apart and toes pointed slightly outward, with a bar resting across your shoulders and traps. Descend into a squat until your thighs are parallel to the floor. Explode upward; as your hips and knees approach full extension, jump off the balls of your feet. Upon landing, move immediately into another squat. Look straight ahead and keep your torso and neck muscles tight throughout.