Obesity is associated with increased pain and poor benefit from traditional pain management. Persons who are obese experience higher rates of daily pain than their normal weight counterparts. And the pain is not exclusively confined to weight-bearing joints, such as the hip or knee. Many systemic inflammatory chemicals are associated with obesity. Hormones that play a role in obesity are associated with degeneration of joints. Studies have shown that weight loss reduces pain, improves sleep, and improves depression, for those with arthritis, low back pain, and fibromyalgia. Studies have also shown that exercise does not worsen pain conditions and in the long run improves pain. Exercise can be as simple as walking, pool exercise classes, chair yoga, or Tai Chi.