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. Hamstrings The hamstrings play a crucial role in many daily activities, such as, running, jumping, walking and cycling. Strengthening your hamstring muscles help to protect your knees from injury by absorbing the stress placed on the knee. Weak hamstrings can lead to knee injury. Equipment Used Aerobic Steps The aerobic step is an elevated platform used during exercise. The height of the step can be tailored to individual needs by inserting risers under the step. The aerobic step is most commonly used for various bodyweight, plyometric and dumbbell exercises. Exercise Instructions Step 1 Stand beside the step or box. Step 2 Jump up and over the step making sure both feet leave the floor and land at the same time. Step 3 Jump over to the other side and repeat for time or reps.