People with osteoarthritis of the knees should undergo low impact activities like brisk walking, swimming, biking, and water aerobics. Water exercises are good for taking off weight from the painful joints. The major goal for stronger knees should be to remain active and lose any extra kilos, thereby putting off undue pressure from the joints. Those who are initiating to exercise, should begin with 10 minutes gradually extending the time to 30 minutes of exercising. Some muscle soreness initially is quite normal and it is quite fine working through it. Among all form of exercise, walking remains the best that aids to strengthen muscles, improve posture and flexibility, and also eases the joint pain.