What exactly is hatha? In modern yoga usage, it often refers to a slow approach – perhaps in contrast to flow – but originally it covered all aspects of physical practice, from breathing techniques to arm balances. In Sanskrit, the traditional language of yogic texts, the word hatha means “force”. It is therefore a “forceful” form of yoga, whose dynamic techniques have powerful effects. Another meaning of hatha is “obstinacy”, which suggests a need for strength of will.