Even if I put on a neoprene mask and scarf, I could only do one run and then had to go into the lodge for half an hour to warm up. It was brutal, but I think I still have a pic of the sign at the lift telling the temperature. They shut down the gondola because they were afraid to put people up on it.
Don't ask me how, I don't even know. I call it Camping Constipation Mode. I usually leave on a Thursday afternoon and get home Sunday night without feeling the urge to shit. And I eat as normally as you can when backpacking, I guess. Seems like most of the dehy food should make you thread a needle at 10 paces but doesn't seem to affect me that way.