Gosh I wish I could sleep like I used to when I was a teenager. I constantly wake up throughout the night. Can't sleep in if I wanted to. Probably get 6 hours of sleep a night if you subtract wakeful interruptions.
Not sure why. I'm not overweight at all, 10% body fat. Exercise every day for at least half an hour, usually more, running, weightlifting, sports. Work isn't stressful. I don't get it.