At least half of grains we eat should be whole grains rather than refined grains (such as white rice and white flour). The body, mind and breathing practices of yoga improve flexibility and balance, increase range of motion, and strengthen muscles, among other benefits. Every year, more than 670,000 total knee replacements are performed in the United States. But few studies have compared knee replacement with nonsurgical treatment. Gout is caused by a buildup of uric acid in the bloodstream that crystallizes in the joints. The key to preventing flare-ups that cause painful joint swelling is to lower levels of uric acid, primarily with medications and diet.