Yoga can help fight stiffness, hardening of the arteries, hormonal fluctuations, depression and loss of bone density. It helps you become more aware of your body's posture, alignment and patterns of movement. It makes the body more flexible and helps you relax even in the midst of a stress stricken environment. Yoga helps clean blood of waste material through lymphatic stimulation, and trains us to loosen muscles and joints that are ignored in our day-to-day lives. Routines like sun salutation get the blood flowing as we warm up and free our body to experience the new stresses we will face. The practice also gets us to handle the weight of our body more effectively, which builds bone and muscle strength so we are more resilient to the frailty that afflicts many. This is why power yoga practitioners have great bodies.