Yoga means union and the system of yoga unites the spiritual, mental and physical training systems. Different sections of yoga are Hatha Yoga, Raja Yoga, Jnana Yoga, Karma Yoga and Bhakti Yoga. All kinds of people can practise yoga, whether religious or not. The yoga postures are designed in such a way that they develop flexibility and relaxation. No exertion should be there while performing the Asanas (postures). Instead, movements must be done slowly and the Asanas must be held for one or two minutes in order to build up the awareness of body and its patterns of behaviour. The essence of Yoga is the inner concentrated awareness. As the breath embodies the individual's life force or prana, it plays an important part in yoga philosophy. Breathing, if modified consciously, can be utilised for creating overall well being. As breathing reflects our emotional states, control of breathing patterns and its awareness can beneficially influence the inner harmony. Yoga is recommended for stress and stress related conditions as it works on body and mind together. Most of the disorders including heart disorders and asthma respond well to yoga therapy.