The Body-Solid Leg Extension & Supine Curl bench is for people who would like to have a some valuable workout session with trainers, bodybuilders, and coaches. These are highly useful fir the front and back of the leg. These exercises can be used to strengthen the knees, hamstrings, quadriceps, and glutes. The Body-Solid Leg Extension & Supine Curl is also very helpful in protecting the knees as well as joints from injury and stress. You can adjsut this product to fit your body comfortably. You can also position yourself for optimum exercise posture. The backpad of the product can be set to 3 upright positions and 2 supinated positions for traditional leg curls. This product is best known for its support as well as comfort it provides