Tai Chi is an ancient Chinese form of calisthenics that utilizes the body's internal energy (chi), mind, and breathing; which may be a useful exercise for older adults in increasing their activity level. A twenty-four of Yang style of Tai Chi is a simple form of Tai Chi that is particularly well-suited for older adults. This proposed study to investigate the effects of a Tai Chi intervention on decreasing fatigue level, and increasing level of activity in healthy older adults.