We are onto the fourth limb of Pantanjali's Yoga Sutra. The previous three were the yamas (restraints), niyamas (observances), and asanas (physical postures). Pranayama or breath control comprises the fourth limb.
Let's continue our review of the eight limbs of yoga. We are on the third limb- asana or physical postures. In general, if you are new to yoga or just not had time to delve into the spiritual study, this is most likely what you associate as yoga.