Interesting. I read in Body By Science (McGuff) that drinking two liters of ice water a day will force your body to burn an additional 125 calories to maintain core temperature.

I know that since I've been following the weight-lifting protocol advocated by McGuff that my ability (and desire!) to sleep without covers, and skip wearing a coat in cooler weather, has increased.

cold, heavy breathing, all silliness because you won't be able to maintain the lifestyle

find changes you can live with to shave 400-500 calories per day and each week you'll lose one pound which is a reasonable method that can be maintained