After a jaunt on Adams last week, I started to wonder about letting one's hands freeze as training for the mountains. It always seems that if I let my hands get really cold, once they warm back up they are warmer than normal. I was just too lazy to put on gloves in this instance, and the weather was clear so I wasn't worried about permanent damage. So my question is, will freezing your hands (certainly not to the point of actual frostbite) help, hinder, or have no effect on your ability to deal with cold?