"Regular exercise is very important as we get older because when we get to 65 we start losing muscle strength at a rate of up to two percent per year" say the researchers in a news release.

It is effective in fall prevention for older people because of improvements in strength and balance, they say.

The researchers tested tai chi in older adults. The slow, gentle, and continuous movements help them develop stronger muscles, better balance control, concentration, and psychological well-being.