Injuries of the knees, such as osteoarthritis or ligament and cartilage injuries, are common. A key to prevention and maintenance is good strengthening of the muscles around the knees. There are numerous exercises one can do at home, such as leg raises, calf raises, hamstring curls, and wall sits. These types of exercises help strengthen the muscles around the knee joint and help in terms of pain relief and range of motion. Walking and cycling can also aid in this endeavour. Good supportive shoes will also help in stabilizing the knee joint. Remember to always consult a doctor before beginning any exercise program.