Understanding the current condition of your pelvic floor will make your yoga for pelvic floor muscles more effective. Do you have a "droopy" or "taut" hammock?
Prana (1) moves from the tip of the nose down to the heart and even below. Apana (2) moves in between the base and the navel, and a bit above. Samana moves around the navel. When Prana, Apana and Vyana converge into Samana Vayu, there is the upward thrust to the throat, where Udana activates and elevates the respiring students to higher realms.