One of the most interesting books I ever read (so much so that I’ve passed it around to friends and suggested people buy it) is “Sleep Thieves” by Stanley Coren. Applying what I learned in it helped me a lot. For instance:
It is a fact that our bodies sleep in 90-minute cycles, going from a light state to a deep state and back 'up" to light. When you spontaneously awaken in the middle of the night (I mean, with no loud noise disturbing you), like when you get up to pee, it’s because you have completed a 90-minute cycle and are in a light enough stage of sleep that a small stimulus (like bladder pressure) is sufficient to rouse you.
Ever awakened a half hour or more before the alarm goes off, thought to yourself “Gee! I feel wide awake! But it isn’t time to get up yet, so I’ll just lie here and daydream that Britney and Christina and Jessica want me to judge their “Who’s Dirtiest in the Sack” Contest”? (OK, maybe that’s just me.) Then when the alarm goes off, you’ve fallen back to sleep and you feel groggy as ever? That’s because you’ve fallen back to sleep and descended into a deeper part of the cycle. When you are forced awake during a deeper part of the 90-minute cycle, you feel awful.
The trick is to try to get sleep in multiples of 90 minutes. I try to do 11-5, or 10-4 if I ant to get to the gym before work. If I don’t fall asleep until, say, between 11:30 and 12, I KNOW I won’t get 6 hours before I have to get up. So if I find myself awake a half hour before the alarm, I don’t risk the groggy stage: I get up, make the morning tea, and start doing things.
Another thing: whatever schedule you create, stick to it. If you have to get up early during the week, and try to stay up late and sleep late on weekends, come Monday you are messed up internally and will have a hard time adjusting again. So don’t sleep extra late on days off unless you have a sleep deficit to make up.
(For example: It’s 7:00am, I’ve been up for 2+ hours, and my school has declared a Snow Day–temps below zero and wind chill WAY below–and I’m not going back to sleep. Spending the time catching up on TMag, and will hit the gym in a few hours. If I tried to go back to sleep, I’d mess up my schedule and make it harder to get to slkeep tonight, and probably wind up getting too little sleep before the alarm goes off tomorrow.)
An important factor: age. Research shows that adolescents need more sleep (probably to allow their bodies to deal with all the physiological changes). Incredibly, the adolescent circadian ALSO shifts: during your adolescent years, your body/metabolism functions optimally if it wakes up later in the morning and goes to bed later at night! (And we thought teens were just lazy and crazy!) Seriously, high schools should start classes at 9:00 or later if they want the students sharp all day!
The truth is, sleep is a need that is as crucial to health (and as complex in the way it functions & affects us) as food. And we need to pay attention to how we use sleep.
Bored yet?
Tim