No wonder teens are so drowsy they need more zzzzzzzzzzzzzzzzzzzz...
By Marissa Cevallos
mcevallos@mercurynews.com
02/04/2010 T
When Glorianna Klyce's radio blasts hip-hop at 5:45 a.m., the 17-year-old rolls over and hits snooze. If it weren't for the second alarm clock that goes off at 6, she might have a much harder time getting to Kennedy High School in Fremont for the 7:35 a.m. first block bell...
She's not the only 17-year-old struggling to get to class. Emerging research shows that puberty upends sleep cycles, making snoozing into the late morning hours as natural for teens as hairy armpits and embarrassing voice squeaks. When teens hit puberty, their internal circadian clocks wind forward 1 to 3 hours, meaning they need 9 hours of sleep on average, a couple more hours than their younger siblings.
Now a growing number of schools are pushing back the morning bell so class times and students' energy are better aligned...
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