Tai chi is often described as “meditation in motion.” There is growing evidence that this mind-body practice, which originated in China as a martial art, has value in treating or preventing many health problems. And you can get started even if you aren’t in top shape or the best of health. In this low-impact, slow-motion exercise, you move, breathe deeply and naturally, while focusing your attention-as in some kinds of meditation. The movements are usually circular, the muscles are relaxed, the joints are not fully extended or bent, and connective tissues are not stretched. Tai Chi can be adapted for anyone.