[seventhtiger]

Something crazy I've experience is when I swam in an outdoors pool every morning early for a while. This involves several temperature shocks, like jumping into the shower (hot), then walking from the shower to the pool (cold), then jumping into the pool (very cold initially, then ok), then walking back to the shower then showering again. This whole routine happens over just 60 minutes.

Other than the overall health and wellness I got I normally associated with exercise, and improved breathing because of swimming, I felt immune to temperature discomfort! After a while, the routine itself didn't bother, nor walking 15 minutes from the parking lot to my office under 50C summer sun at noon. I could go out in winter in any clothes I want.

It was very noticable and very specific. Sensitivity to temperature itself may be a form of unfitness.

[hombre_fatal]

These kinds of theories along with "you just need to acclimate to it" always hit a wall when they meet me, someone in great shape who grew up around Houston (where it's miserable) and sweats all day unless it's <80F with no humidity.

Right now I live on a beach that's 85F outside and I will be the only person profusely sweating tonight while most people don't even seem to have a sheen. I first noticed it when I moved to this beach newly single and was going on dates—it's a little confusing/embarrassing looking like you swam to the date yet nobody else is sweating.

Every once in a while I meet someone like me with a body made for the Swiss mountains. And every once in a while I meet the polar opposite: someone who can walk around in the Texas summer with pants and a polo.

I think it's 90% genetic. And muscle mass only makes you sweat more.

[seventhtiger]

You're probably right, but my point was more specific than general fitness means less sensitivity to temperature. I haven't experience that either.

I meant the specific many temperature shocks daily (hot to cold to coldest to ok to cold to hot) absolutely changed the way I feel temperature. I still knew it was hot but I wasn't uncomfortable at all.