Doctors at Harvard say the slow, deliberate movements in Tai Chi can improve your stability and balance. The flowing motions and deep, slow breathing can exercise the body and calm the mind. The motions can train you to shift your weight while maintaining your balance. Like yoga, Tai Chi has a meditative quality that can trigger the relaxation response. This physiological change can help lower blood pressure, heart rate, breathing rate, and oxygen consumption, and adrenaline levels.