Knee supports and braces are used following knee surgery and during knee rehabilitation and can help to provide stability and support following knee injuries such as anterior cruciate ligament (ACL) rupture, torn knee cartilage, sprained medial knee ligament, posterior cruciate ligament (PCL) rupture, patella tendonitis, knee arthritis and runners knee. Arthritis knee braces such as the Donjoy Arthritis Knee Brace can relieve knee pain due to osteoarthritis by improving the biomechanics of the knee joint and taking stress off the area of the joint that is affected by arthritis. This can improve knee function and delay the need for knee replacement surgery.