The Sanskrit word bandha means to hold, bind, or lock. In yoga, bandhas refer muscle contraction techniques used in conjunction with yoga breathing or pranayama. They are not for beginners.
Yoga bandhas are an advanced technique used to restrict or enhance the flow of prana to desired regions. They are applied to a group of muscles in the abdomen, neck and/or pelvic floor.
BANDHA | बन्ध
YOGA BANDHA GUIDES
Prana Picks: Yoga Books
The Great Lock Technique
The Maha Bandha, called the 'giver of great powers,' is one of the most advanced yoga techniques mentioned in the Hatha Yoga Pradipika. It is a combination of the three primary body locks applied simulatneously to control the flow of prana in the body.