After a few weeks of training you can make BAT activate on command. The process for doing it is a familiar one. Once you’re already cold, clench the muscles in your feet and hands and then sequentially tighten every muscle above them. The method is essentially the same as the one you use during power breathing except that now, rather than simply pushing all the blood up to your head in general, you instead focus on a specific point on a small ridge on the backside of your skull where the temporal bone and occipital bone meet just behind your ears. Once you’ve pushed all of your muscles up to
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