During the school year, I can only manage 8 hours maximum a night of sleep, but it's been summer for a month now and I have time to sleep 10+ hours but my body won't let me!
After 8 hours of sleep, my body naturally wakes up and no matter how long I lay there trying to fall asleep to get at least 2 more hours, I can't fall back asleep.
I try to follow the sun; I typically go to bed between the hours of 9 and 11 PM (sometimes it's 12 or 1 AM... I'm a teenager and stay out late with friends some nights, but that's only like 1% of the time) and get up at 5-7 AM no matter what. I just want to get a lot of sleep while I can, summer's going by so fast and pretty soon I'll be back to 6-8 hour nights :(
SO how can I get 10-12 hours of sleep if my body doesn't let me??? It's really frustrating.
I get a lot of cardio exercise.. I've been doing running or cycling every other morning and p90x in the afternoons
One symptom of over-training is insomnia, which is something I have put myself through, in the past.