The term has a few meanings. It’s both a school of thought in the Hindu religion, and a system of mental and physical exercise developed by this school. All forms of originated in India. People who follow this school, and practice any form of are called yogis, or yogins. Students study under prolonged and careful guidance of the teacher, known as the guru. The first syllable “gu,” in Sanskrit means light; the second syllable, “ru” means light. A guru is a spiritual teacher who leads the pupil from darkne ....