Tai Chi is an ancient Chinese exercise that can help improve insomnia. A study found that patients with chronic heart failure who participated in 12 weeks of Tai Chi training experienced significantly decreased time spent in unstable sleep states and improved sleep stability compared to a control group. This enhanced sleep may benefit blood pressure, heart rate, and quality of life for heart failure patients. A separate study on older women with osteoarthritis found that 12 weeks of Tai Chi led to reductions in pain and stiffness by 35% and 29% respectively, and improved ability to perform daily tasks by 29%, compared to no changes in a control group. Tai Chi appears to be a beneficial exercise for managing arthritis symptoms and physical functioning.