The purpose of relaxation is to do away with certain activities that place undue stress upon the body. Most of the techniques of relaxation therapy involve retraining the muscles of the body to get rid of hidden underlying tension. Relaxation therapy also teaches individuals to recognise slight tension in their everyday life and enables them to deal with this. When an individual is stressed, then the so-called "fight or flight response" is activated, with the person experiencing increased heart rate, blood pressure, and respiratory rate. One of the major tools employed by relaxation therapists is deep breathing, as tension per se causes breathing changes.
People under stress tend to breathe with relatively short, shallow breaths. Yoga is a form of relaxation which employs breathing and positioning of the body to improve agility, both mental and physical, and reduces tension by allowing the body to relax. Yoga promotes happiness in a state of inner tranquillity and balance, with inner peace and harmony at the root of the therapy.