There are numerous studies on the effects of sleep, or lack thereof on hormone balance and the effects on metabolism. Generally, people who get 7-8 hours of sleep a night have faster metabolisms because all their hormones are in balance. Get less than 7 hours and your chances of increasing your BMI [body mass index] go up proportionately. And it works both ways – get more than 10 hours sleep, and that will also throw your system off. I read once that getting a full 8 hours of sleep a night can increase your metabolism by as much at 40%. That’s huge when you’re trying to control your weight. There’s a great article on the subject from Stanford University – you can check it out here: Stanford Report on Obesity linked to hormonal changes, lack of sleep.
That being said, I get more than I used to, but most of the time it’s between 6 and 7 hours, and it’s rare that I sleep soundly through the night. I’ve realized lately that where we live [on a main road] can get too noisy when we have a window open, or even just having an air conditioner in the window, so if I use earplugs I sleep much more soundly. Luckily my husband doesn’t need them, so he has become my alarm clock, since I never hear it anymore. It’s not an issue in the fall or winter – or even spring when the nights are still very chilly and the house is a comfortably cool temperature inside.
But, in the periods where I’ve gained noticeable weight, I was definitely getting very little sleep – 4 to 6 hours nightly due to being young and not knowing better. Ever since I was a kid I hated sleeping because my parents both worked and got home fairly late in the evenings, so we’d eat dinner [finish your plate!], watch a bit of TV and then it was bedtime. I was so starved for their attention that I grew to feel like sleeping was a waste of time or even a punishment. I think I established those feelings towards sleep by age 4… 30 years later, I’m still trying to shake them and make sleep a priority – a reward, not a punishment.



