When you hear someone say ‘how low can you go?’ what’s the first image that comes to mind? A limbo stick, perhaps? Or maybe a scale? Or are you like me, and a picture of a programmable thermostat pops into your head? I don’t know where you keep your thermostat in the wintertime, but around here it’s set to 65F during the day. Yep, 65F.
Used to be, we kept it at balmy temperatures – I’m talking shorts weather, all year round – but that’s because I lived in NYC where it’s pretty uncommon to actually pay for heat. In Boston, we dropped it to 68F. Then a while ago, it somehow got set to 65F without anyone really knowing how, and La Paloma didn’t seem to mind and The Beard doesn’t care and the gas bill never looked better… oh, and using less gas is green, too… so I left it.
Now you can bet when I read on Treehugger that research published in the journal Obesity Reviews seems to have discovered a link between increasing average indoor temperatures and rising rates of obesity, I was suddenly feeling pretty good about my little socks-and-slippers house.
TIME has picked up on the story, linking to a study by researchers at University College London:
The authors of the new study note that average indoor temperatures have risen steadily in the U.K. and U.S. over the last several decades, as central heating has become increasingly available — and rates of obesity have risen too. The average temperature in British living rooms went from 64.9 degrees F to 70.3 degrees F, from 1978 to 2008. Living rooms in the U.S. have long been heated to at least 70 degrees F.
It’s all about the modern expectation of comfort – we want to be warm and we can be warm, but when we’re warm there’s not all that much going on metabolically. But when it’s just a bit colder, even when we’re not shivering, the calorie-burning power of brown fat is activated. It starts working to warm us up, and it sticks around. When we’re warm all the time, on the other hand, levels of brown fat decrease and there goes that ability to burn a few extra calories in the cold. 100 to 200 per day, but hey, that adds up!
The only problem? Dr. C. Ronald Kahn, a Harvard Medical School professor who does research on brown fat, says people don’t like to keep their houses chilly and won’t stick with it. What do you think? Is weight loss enough of a reason to drop your thermostat in the wintertime?