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Knowledge center. The knee is a complex structure and one of the most stressed joints in the body. It is the largest joint, vital for movement, and vulnerable to injury. The knee is the most commonly injured joint by adolescent athletes with an estimated 2.5 million sports-related injuries annually. Many knee injuries can be successfully treated with simple measures, such as bracing and strengthening exercises. Other injuries may require surgery to correct.
Nearly everyone has experienced knee pain. Whether itâs caused by arthritis, excessive foot pronation or overuse of the muscles that protect this vulnerable joint, our knees take a knocking. In fact, knee arthritis is the single greatest cause of chronic disability among U.S. adults age 65 and older.early everyone has experienced knee pain. Whether itâs caused by arthritis, excessive foot pronation or overuse of the muscles that protect this vulnerable joint, our knees take a knocking. In fact, knee arthritis is the single greatest cause of chronic disability among U.S. adults age 65 and older.