I'm exhausted. Plain and simple. Too much to do and too little sleep. I used to think that working out instead of going to bed was a good idea. For the record, it is not. Sleep is a crucial part of losing weight.
Here's a snippet from a 2004 USA Today article:
Scientists have found that sleep deprivation increases levels of a hunger hormone and decreases levels of a hormone that makes you feel full. The effects may lead to overeating and weight gain.
The article also asserts that the rate of obesity in America (65%) mirrors the rate of people not getting a full night's sleep (63%).
I read another study recently that claims sleep deprivation causes the body to metabolize muscle rather than fat. Two groups of people got the same amount of exercise and calories. One group got 8.5 hours of sleep a night. The other group got 5.5 hours. Both groups lost the same amount of weight but half the weight lost in the 5.5 hours of sleep group was muscle.
A problem that plagues many overweight people (myself included) is sleep apnea. This disorder tends to be a double edged sword. For those of you who are unfamiliar with sleep apnea, it's the medical term for snoring. When you snore, you're actually waking yourself up many times each minute (it was over 100 according to my sleep study). Sleep apnea worsens with weight gain. As the previous studies showed, sleep deprivation leads to more obesity. Downward spiral.
If you think you might have sleep apnea, go do a sleep study. The subsequent rest I've gotten because of it was worth the testing. I don't think I would have been able to lose the weight I've lost without treatment.
Everyone else, get a good night's sleep. It will help you lose weight.