Some info about YOGA

Yoga (Sanskrit, Pāli: योग, /ˈjəʊɡə/, yoga) is a commonly known generic term for physical, mental, and spiritual disciplines which originated in ancient India. Specifically, yoga is one of the six āstika ("orthodox") schools of Hindu philosophy. It is based on the Yoga Sūtras of Patañjali. Various traditions of yoga are found in Hinduism, Buddhism, Jainism and Sikhism.Pre–philosophical speculations and diverse ascetic practices of first millennium BCE were systematized into a formal philosophy in early centuries CE by the Yoga Sutras of Patanjali. By the turn of the first millennium, Hatha yoga emerged as a prominent tradition of yoga distinct from the Patanjali's Yoga Sutras. While the Yoga Sutras focus on discipline of the mind, Hatha yoga concentrates on health and purity of the body.Hindu monks, beginning with Swami Vivekananda, brought yoga to the West in the late 19th century. In the 1980s, yoga became popular as a physical system of health exercises across the Western world. Many studies have tried to determine the effectiveness of yoga as a complementary intervention for cancer, schizophrenia, asthma and heart patients. 
                                                                                               In a national survey, long-term yoga practitioners in the United States reported musculo–skeletal and mental health improvements.In Vedic Sanskrit, the more commonly used, literal meaning of the Sanskrit word yoga which is "yoke", "to join", "to unite", or "to attach" from the root yuj, already had a much more figurative sense, where the yoking or harnessing of oxen or horses takes on broader meanings such as "employment, use, application, performance" (compare the figurative uses of "to harness" as in "to put something to some use"). All further developments of the sense of this word are post-Vedic. More prosaic moods such as "exertion", "endeavour", "zeal" and "diligence" are also found in Epic Sanskrit.There are very many Compound words containing yog in Sanskrit. Yoga can take on meanings such as "connection", "contact", "method", "application", "addition" and "performance". For example, guṇá-yoga means "contact with a cord"; chakrá-yoga has a medical sense of "applying a splint or similar instrument by means of pulleys (in case of dislocation of the thigh)"; chandrá-yoga has the astronomical sense of "conjunction of the moon with a constellation"; puṃ-yoga is a grammatical term expressing "connection or relation with a man", etc. Thus, bhakti-yoga means "devoted attachment" in the monotheistic Bhakti movement. The term kriyā-yoga has a grammatical sense, meaning "connection with a verb". But the same compound is also given a technical meaning in the Yoga Sutras(2.1), designating the "practical" aspects of the philosophy, i.e. the "union with the Supreme" due to performance of duties in everyday lifeIn Hindu philosophy, the word yoga is used to refer to one of the six orthodox (āstika) schools of Hindu philosophy. The Yoga Sutras of Patanjali are often labelled as Rāja yoga.Someone who practices yoga or follows the yoga philosophy with a high level of commitment is called a yogi or yogini.Generally put, yoga is a disciplined method utilized for attaining a goal. In this sense, the purpose of yoga depends on the philosophical or theological system with which it is conjugated . Bhakti schools of Vaishnavism combine yoga with devotion to enjoy an eternal presence of Vishnu. In Shaiva theology, yoga is used to unite kundalini withShiva. Mahabharata defines the purpose of yoga as the experience of Brahman or Ātman pervading all things. In the specific sense of Patanjali's Yoga Sutras, the purpose of yoga is defined as citta-vṛtti-nirodhaḥ (the cessation of the transformation of awareness). In contemporary times, the physical postures of yoga are used to alleviate health problems, reduce stress and make the spine supple. Yoga is also used as a complete exercise program and physical therapy routine.