Haṭha yoga is a branch of yoga. The Sanskrit word हठ haṭha literally means “force” and thus alludes to a system of physical techniques.
Haṭha yoga practice is complex and requires certain characteristics of the yogi. Section 1.16 of the Haṭha yoga Pradipika, for example, states these to be utsaha (enthusiasm, fortitude), sahasa (courage), dhairya (patience), jnana tattva (essence for knowledge), nishcaya (resolve, determination) and tyaga (solitude, renunciation).