Heat loss and cooling and such

He should try walking around in cold weather with everything covered but his groin.  The wrist might lose a rank or two.

But, yeah, rolling up one’s sleeves does help a lot.  My favorite shirt for changing conditions (and sun and bushwhacking) is a loose-fitting,100% nylon shirt in a safari style.  Big chest pockets.  The epaulets are actually helpful for securing a Chrome Dome umbrella hands-free, and there is another pair of buttoned straps to secure the rolled-up sleeves at your mid-upper arm.  It needs the strap because the sleeves are a loose cut – not tight enough to stay suspended by folding them over – which means there’s still some air exchange going on there.  I’ll take it to Cuba next month to help keep the sun off my pale, Alaskan skin.

I had noticed that just rolling up my sleeves did an amazing job of helping me cool off, but I never would have thought that the wrist was such an effective heat exchanger.

“I never would have thought that the wrist was such an effective heat exchanger”

At home on a hot day (back when I lived in places that got hot), I’d run cold water over my wrists.  It works really well.  In the mountains, use a cold stream.

Try your ears.

These studies are always based on what’s uncovered when you are normally clothed.  But what you are looking for is an area with lots of blood pumping through near the skin.

Which is why when I am hot I pour water over my Head. grin

Anywhere arteries are close to the surface. Neck, wrists, ankles, for instance. Makes perfect sense.

The palms of the hands are even more prominent AVA’s (arteriovenous anastomoses) than the wrists.  See for instance http://news.stanford.edu/2012/08/29/cooling-glove-research-082912/ for Stfd cooling glove research (even mentions bears).  Some of you may have seen football players using the cooling gloves.