Muscle Groups Worked in This Exercise: Quadriceps and Hamstrings
Preparation: Stand with feet shoulder width apart and your trunk flexed forward slightly with your back straight in a neutral position. Arms should be in the ready position with elbows flexed at about ninety degrees. Your lower body should be positioned with your thighs parallel to the ground.
Execution: Explode vertically and drive your arms upward. Land on both feet and quickly repeat. Prior to takeoff, extend the ankles to their maximum range to ensure proper mechanics.