Yoga is a physical, mental, and spiritual practice that originated in ancient India. First codified by the sage Patanjali in his Yoga Sutras around 400 C.E, the practice was in fact handed down from teacher to student long before this text arose. Traditionally, this was a one-to-one transmission, but since yoga became popular in the West in the 20th century, group classes have become the norm. 📖 Read on Wikipedia