Diaphragmatic Breathing

Rachel Goldman and Tom Bilyeu both speak to diaphragmatic breathing with conviction — Goldman says she introduces it with nearly every client in early sessions because she believes it's immediately accessible and activates the parasympathetic relaxation response, while Bilyeu describes it as "one of the most life-changing things that you can do," claiming it creates neurochemical shifts through a purely mechanical process. Rena Malik also recommends it, though more specifically, as one of several exercises to help tense muscles learn to relax. All three frame it as a no-tools technique anyone can use, though the strength of Goldman's and Bilyeu's claims about nervous system effects are theirs, not established fact.