Voukelatos A, Cumming RG, Lord SR, Rissel C. A randomized controlled trial of tai chi for the prevention of falls: the Central Sydney tai chi trial. J Am Geriatr Soc. 2007 Aug; 55(8):1185-1191.

A recent study of 702 adults aged 60 years and older indicates that practicing tai chi once a week may lower the risk of falling. An ancient Chinese practice, tai chi uses slow, fluid movements, mental imagery, and deep breathing to build strength, balance, and flexibility. The practice has been studied for its possible benefits to elderly adults. Some researchers have shown that tai chi can improve balance and cut fall risk, as well as lower blood pressure.

This study analyzed healthy adults who were relatively younger, and used community tai chi classes instead of specially designed programs. The study subjects were randomly assigned to either take tai chi classes once a week for 16 weeks or to go on a waiting list for classes. All of the class instructors were experienced in working with older adults.

The researchers tracked fall rates in both groups during the 16-week course, and for 8 more weeks after it ended.

During that time, there was no difference between the groups in the number of people who suffered one fall-15% in both groups. However, those in the tai chi group were much less likely to fall multiple times; their fall rate was one-third lower than the waiting-list group's fall rate.

The researchers thought that improved balance may have been the key difference, as the tai chi group showed gains in various tests of balance and stability. Investigators concluded that taking a tai chi class once a week is an "effective and sustainable" way for older adults to lower their fall risk.