What Are Bandhas (Locks) in Yoga?

Bandhas are internal energy locks, which are subtle but powerful muscular contractions used to control and direct the flow of energy (prana) in the body. The two most common bandhas are Mula Bandha (the root lock, an engagement of the pelvic floor) and Uddiyana Bandha (the abdominal lock, a gentle drawing in of the lower abdomen). Engaging bandhas helps to create stability, lightness, and power in the postures.