Tuesday, October 03, 2006

Sleep's Affect on Your Metabolism & Mood

Recent studies show a lack of sleep has broader affects on health than you may have thought, reports CNN. If you're not getting enough sleep, you're more at risk for weight gain, diabetes and depression.

The state of sleep in America
Americans get an average of seven hours of sleep per night. That's one to two hours less than they got 40 years ago.

The amount of sleep that we need varies. In general, we need seven to eight hours, but one doctor told CNN, "The target should be to get an adequate amount of sleep to feel rested during the day."

One way to tell if you're getting enough sleep is how fast you fall asleep. A person who is getting enough rest should take 15 minutes to fall asleep. "If you're falling asleep in one or two minutes, you're probably sleep deprived," another doctor explained to CNN.

Sleep and metabolism
A 2004 University of Chicago study found men with just four hours of sleep per night had an 18 percent dip in leptin (the hormone that tells your brain that you're full) and a 28 percent increase in ghrelin (the hormone that triggers hunger).

Sleep also affects the way your body deals with insulin. An insulin resistance can lead to weight gain and diabetes. People who aren't getting much sleep (less than 6.5 hours) need 30 to 40 percent more insulin do clear glucose out of their systems. That's according to another Chicago University study.

Another University of Chicago study shows people who aren't getting enough sleep have unstable moods and higher levels of cistrol (a stress hormone). Also, "positive moods are lower in people with sleep loss," a University of Chicago researcher told CNN. She also noted that these changes are "typical of clinical depression."

Pound360 Archive

About Me

My photo
I started pound360 to channel my obsession with vitamins, running and the five senses. Eventually, I got bored focusing on all that stuff, so I came back from a one month hiatus in May of 2007 (one year after launching Pound360) and broadened my mumblings here to include all science.