Knee pain can be caused by several factors including excessive foot pronation, arthritis, overuse of the joint muscles and others. In the United States most people above the age of 65 suffer from knee arthritis and this causes chronic disability among these adults. It is difficult to control knee pain but when it comes across it is important for you to ensure that you have taken the necessary measures such as stretching and strengthening of your knee muscles and also doing some exercises that can relax your knee pain. In sports most athletes also have the problem of knee pain especially after playing for a long period but the sports injury aids that they carry to the field while playing or running helps them to reduce the pain. Below are tips for physical therapy.