Many experts say stretching is an exercise in itself. Yoga exercises, or movements, improve your balance, flexibility, posture and circulation. Yoga originated in India a long time ago, and is aimed at unifying the mind, body and spirit. Modern yoga - the type of yoga practiced by most people in western countries - uses a combination of meditation, posture, and breathing exercises. Yoga can be tailored to meet the needs of individuals, such as those with arthritis, asthma, or certain body pains. Pilates is similar to Yoga, but it focuses more on the core abdominal and back muscles.