Practice 03 · De-stress
Stress is a posture your whole body holds.
Stress isn't just in your head. It's a full-body program, and the way out runs through the body too. The calming branch of your nervous system is trainable, and its best-evidenced lever is free.
“Reset your vagus nerve with this one gadget / ice bath.”
Slow breathing does most of what 'vagus reset' products promise, for free, with better evidence. Cold plunges acutely raise stress hormones; that's the design. Trials show inconsistent mood or immune benefits, with real risks in cold water. Optional experiment, not a foundation.