Tai chi is a low-impact and aerobic exercise that is relaxing and can improve mental and emotional health along with physical health. This Chinese form of exercise improves balance, strength, and calmness, and may decrease pain and stiffness. It is a favorite among those with arthritis, cancer, and other debilitating conditions. Tai chi is also good for older adults because it does not involve impact on the joints. Follow the links below to find WebMD's comprehensive coverage about how tai chi works, benefits of tai chi, and much more.