Cosmoline

Get this. It's about five below zero this morning and clear, with a light breeze. I decided to put on my union suit long johns to make sure the cold couldn't get to me. On top of that I have regular wicking polartech and a jacket, plus gloves and bala. As it's the end of the week my energy is flagging and I had a devil of a time on the hills. I got into work and was surprised to find my bala heavier by a pound and my longjohns drenched in sweat. Now keep in mind I wasn't overheated and noticed no external sweating. It's just that the longjohns aren't wicking. They hold the moisture. It was a telling experiment. I suspect I sweat at least this much during other commutes, but never notice because it's wicked away and evaporates. That much water loss requires as much hydration as a summer ride, but I haven't been doing nearly that much. I'm going to redouble my hydration efforts and will hopefully see some increase in energy.

MSUcommuter

don't forget about the salts! you lose lots of energizing salts with heavy sweating. have a sports drink occasionally.

mlh122

i rode in 10 - 20F weather and was afraid of getting to work all sweaty so i wore a windproof jacket, wicking tshirt, balaclava, wicking thermal tights, jeans over the tights, and waterproof shell over the jeans, wool socks and hiking boots. I was pretty cold when i started but about 1/4 mile sprint into it i was fine.