12 Health Mysteries Explained
Why Do Teens Sleep Late?Theyre not lazy; they cant help it. During childhood, melatonin, the hormone that regulates the wake-sleep cycle, is secreted by the pineal gland early in the evening. When puberty hits, from around ages 10 to 14, melatonin is released later, around 9 p.m. or 10 p.m. This shift often makes many teenagers incapable of falling asleep before 11 at night, says teen sleep expert Mary A. Carskadon, Ph.D., a professor at Brown Medical School and the director of the Bradley Hospital Sleep and Chronobiology Research Laboratory, in Providence. Since teens still need about nine or more hours of sleep, they try to make up for the time theyve lost at night by sleeping in.
Next: What Causes Hiccups?
Most Popular Galleries
“Our friends at POPSUGAR say it best: “Instead of spending lunch glued to your computer, take advantage of some much-deserved ‘me time’ with these 15 tips to make every day a little bit healthier (and...”
A-listers were dressed to the nines at the 2014 Emmy Awards last night, but thes...
from The Nest Blog » house & home
Yes, they’re annoying--and, yes, there are ways to deal. ...
Your square footage is set in stone, but if your space feels stuffed with stuff,...
from POPSUGAR Home
For what people are paying, this'd better be good. Read mor...
from Tastepartner on The Huffington Post
from HuffPost Home - The Huffington Post
It’s back-to-school time, and one great way to support your budding or independ...