If I read the methods correctly, then how does this fall into the category of &quot;learned behavior&quot;?<p>Exposing the body to these temperature extremes, which are far outside the norms most of us experience and which must induce borderline hypothermia, surely has its own physiological effect.<p>I don&#x27;t doubt the effect can be beneficial, but that seems squarely in the camp of physical treatment as opposed to &quot;thinking&quot; yourself into a different bodily state.