Tim, my exposure was intermittent, with some prolonged periods when I went out. At home I was in shorts, since there is heating.
I'll be under the shower from a minimum of 3 minutes to a max of 5, and the water is pretty cold and numbing, so I suspect that's a norepinephrine spike which upregulates from the early morning the daily thermogenesis.
Las winter I never used my wintry clothes, donning a thin long-sleeved shirt or a T shirt. Temps ranged from below freezing to some above, it was not a cold winter.
One secondary reason for burning more is that cold makes you more active, you walk more briskly and sometimes I just felt like running instead of walking, but that sure doesn't justify the delta I observed.
Also, shivering which sometimes I encouraged is a form of physical activity.
Must say that: one night I went walking for an hour with a chilling wind in a T shirt, and it felt like hell, the cold Tibetian hell. Time dilated and it seemed like I was doomed to unending suffering. I had to pretend I was perfectly all right since there were lots of people around, with heavy clothing. Back home it was warm though so it constituted an ntermittent exposure.
Edited by mccoy, 07 June 2018 - 12:25 AM.