While I've had a full day of presentations, I think my favorite topic of the day has been sleep, circadian rhythms, and metabolism. I suppose it could be because this is the issue most relevant to my current lifestyle. As an undergraduate student, twice a year the dreaded finals swing around and you find people living in the library and barely sleeping. These same students, afraid to waste precious
Well I'm not saying that the Sleep Conference is my personal answer to this question, but there has been quite a bit of recent research linking sleep deprivation with increased hunger, caloric consumption, and (in the end) weight gain. What I found most interesting was that one study (which I believe came out of this link) showed that sleep deprived participants did consume more calories, but statistically consumed less calories per waking hour than non-sleep restricted participants. This indicates to me that caloric intake isn't the whole story, and perhaps metabolic rates are shifted because of the lack of sleep so that the calories consumed are not efficiently put to use.
Mind you, this is just my take on a particular presentation and I suggest checking out original sources such as this to get the full story. Please feel free to chime in on the comments below as well!
I heard a study on NPR where two sleep tests were conducted on a group of healthy subjects. The subjects were given 8-10 hours of sleep each night for 4 nights in the first test and 4-5 hours of sleep each night for 4 nights in the second test. The researchers analyzed the subjects' fat cells after each study and found that the cells developed insulin resistance in the second test. No insulin resistance was found in the first test.
ReplyDeleteAlso, here is a scholarly article on sleep deprivation affecting metabolic rates: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1991337/
Hope you had a great time at the sleep conference. Sounds like fascinating stuff.
Thank you for the wonderful comment Robert! I'll be sure to check out that article as soon as I have time. :)
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