This article appeared in the Jan-Feb 2010 issue of Harvard Magazine.
"Kerr is careful to note that tai chi is “not a magic cure-all,” and that Western scientific understanding of its possible physiological benefits is still very rudimentary. Yet her own experience and exposure to research have convinced her that its benefits are very real—especially for older people too frail to engage in robust aerobic conditioning and for those suffering from impaired balance, joint stiffness, or poor kinesthetic awareness."
“Tai chi is a very interesting form of training because it combines a low-intensity aerobic exercise with a complex, learned, motor sequence. Meditation, motor learning, and attentional focus have all been shown in numerous studies to be associated with training-related changes—including, in some cases, changes in actual brain structure—in specific cortical regions.”
"Qigong, sometimes called the “grammar” of tai chi, comprises countless different smaller movements and breathing exercises that are often incorporated into a tai chi practice. “One reason tai chi is popular is that it is adaptable and safe for people of all ages and stages of health,” Wayne points out. “Recent tai chi forms have even been developed for individuals to practice in wheelchairs. And although few formal medical-economic analyses have been conducted, tai chi appears to be relatively cost-effective.”
"The National Center for Complementary and Integrative Health has supported studies on the effect of tai chi on cardiovascular disease, fall prevention, bone health, osteoporosis, osteoarthritis of the knee, rheumatoid arthritis, chronic heart failure, cancer survivors, depression in older people, and symptoms of fibromyalgia."