I just read this very interesting article about sleep and teenagers. I'm noticing that now that I'm done with school and can be more in tune with my awake and tired cues I tend to go to sleep around 10:30. I'm still not totally honoring them because of a newborn and a toddler, of course, but it's a huge improvement from when I was doing homework after the kids went to sleep.
"Biology’s cruel joke goes something like this: As a teenage body goes through puberty, its circadian rhythm essentially shifts three hours backward. Suddenly, going to bed at nine or ten o’clock at night isn’t just a drag, but close to a biological impossibility. Studies of teenagers around the globe have found that adolescent brains do not start releasing melatonin until around eleven o’clock at night and keep pumping out the hormone well past sunrise. Adults, meanwhile, have little-to-no melatonin in their bodies when they wake up. With all that melatonin surging through their bloodstream, teenagers who are forced to be awake before eight in the morning are often barely alert and want nothing more than to give in to their body’s demands and fall back asleep. Because of the shift in their circadian rhythm, asking a teenager to perform well in a classroom during the early morning is like asking him or her to fly across the country and instantly adjust to the new time zone — and then do the same thing every night, for four years.
...The lack of sleep affects the teenage brain in similar ways to the adult brain, only more so. Chronic sleep deprivation in adolescents diminishes the brain’s ability to learn new information, and can lead to emotional issues like depression and aggression. Researchers now see sleep problems as a cause, and not a side effect, of teenage depression. In one study by researchers at Columbia University, teens who went to bed at 10 p.m. or earlier were less likely to suffer from depression or suicidal thoughts than those who regularly stayed awake well after midnight."
