BeauV wrote:From my experience back country skiing, I'm with OM. Get your core warm and your hands will warm right up. I'm guessing that you're wearing too little on your chest and legs and that's making hands and feet cold. Simply put, there's no amount of insulation that you can put on your hands to keep 'em warm without the blood going in being nice and warm. If the blood cools going down your arms to your hands, you've lost a lot. In warm weather we're used to wearing light weight stuff which makes it easy to pump etc... but that works against you when it's cold.
I haven't sailed a Laser in years, but when I had to wear heavy gloves I tied the tails of the control lines to the boom so I could grab them from there instead of out of the cockpit.
BV
Yup, but the blood temp only drops slightly and the brain responds by shutting down the blood supply to skin and muscle in the extremities to conserve core heat, which is what makes the hands and feet so cold and leads to some interesting and tricky aspects of hypothermia and rewarming.
The nerves also begin shutting down and what happens there is interesting: Normally, large diameter nerve fibers transmit touch, joint position and block transmission of pain sensation in the spinal cord, which is why light brushing often makes a minor injury feel better. However, those large fibers shut down first in the cold leaving the small fibers, which transmit pain and temperature sensation to go wild. Then everything eventually goes numb.