What is Hatha Yoga? Hatha yoga, also called Haṭhavidyā, is a branch of yoga. The word haṭha (lit. "force") denotes a system of physical techniques supplementary to a broad conception of yoga.
Hindu tradition believes that Shiva himself is the founder of hatha yoga.
In the 20th century, hatha yoga, particularly asanas (the physical postures), became popular throughout the world as physical exercises, and is now colloquially termed "yoga".