MUSCLES ENGAGED Quadriceps The quadriceps (quads) are a group of four muscles on the front of the thigh. They allow your knee to straighten and provide stability when standing. Your quads are the most important muscle group for maintaining the ability to stand and to walk independently. Glutes Gluteal Muscles (Glutes) are one of the strongest muscles in the body and are the connecting point between your legs and back muscles. Glutes are used in a variety of actions from moving the leg to extending and rotating the hip, as well as extending and rotating the trunk of the body. Equipment Used Plyometric Box Plyometric Boxes increase athletic ability concerning quick movements and explosiveness. They come in a variety of different heights (12"-48") and are usually made of metal or wood. Exercise Instructions Step 1 Place your entire foot up onto the step. Step 2 Pull your body up pressing through your heel and fully extending your hip and knee at the top. Step 3 Lower yourself back down to the starting position.