Hatha yoga has become popular in all over the world in recent years. In India, the widely practiced ones are hatha yoga, raja yoga, jnana yoga, integral yoga, karma yoga, bhakti yoga, mantra yoga, kundalini yoga, sahaja yoga, laya yoga, and many more. Hatha yoga includes practice of asanas, pranayamas, and kriyas (purification techniques including breathing cleansing techniques and shatkarmas–six groups of purification practices). Around 900 BC, the ancient sage Patanjali evolved the eight stages of yoga which is called as ashtanga yoga. As such, integral yoga incorporates hatha yoga, meditation, and pranayama. In the Indian subcontinent, integral yoga is also known as yoga of transformation.
one can practices yoga, with yogic attitude (attitude of patience, persistent practice, overcoming obstacles within self, that is, laziness, anger, delusion, and desire for being different or better than others), there are several changes in physiology. There are diffferent shcools of the yoga, NATH yoga is one of the oldest of them.
The yogis were primarily associated with the Yogic-traditions promoted by the great Nath saints, e.g. Matsyendranath, Gorakshanath, Chauranginath etc. Hatha yoga is considered as the prominent part of those traditions promoted by these great Nath masters.