Parivrtta trikonasana is an advanced variation of trikonasana, or triangle pose. It is also related to parivrtta parsvakonasana (revolved side angle pose), in which the front leg is bent.
Traditionally, parivrtta trikonasana is believed to activate the svadisthana (spleen or sacral) chakra. By energizing this chakra, the pose opens the practitioner to creativity, pleasure, and feelings of self-worth and joy. It ignites passion, stokes the digestive fire, and can even help awaken kundalini.
Those lacking the flexibility or balance to practice the full expression of this pose may use a yoga block to support the arm reaching toward the ground.