Let me break this down for you: 1) There is well established science that links the dive reflex to physiological changes in the human body. 2) Using the dive

Let me break this down for you: 1) There is well established science that links the dive reflex to physiological changes in the human body. 2) Using the dive reflex as an anti-anxiety measure is well established in psychology. 3) Humans do respond differently to things and if they don't make you feel good, don't do them. There is nothing postmodern about arguing "some people enjoy a hot sauna and others find it miserable." My wife, for instance, will not do the dive reflex thing because it ruins her makeup. Individual variation is a thing. 4) I am not attempting to write airtight arguments to win a debate, but writing very loosely to share what I've learned with others. 5) If you're not sure about points 1-3, you are welcome to research them yourself instead of insisting I present them to you as formal arguments.