Tired teens may be putting themselves at risk for injury when they play sports, a new study suggests.
Researchers from the Children's Hospital of Los Angeles and the Institute for Scholastic Sport Science and Medicine found that teens who got at least eight hours of sleep a night or more had a lower risk of getting injured while playing sports than their sleepier counterparts.
The study included 160 student athletes with an average age of 15 (about half were boys, half were girls) who attended Harvard-Westlake School in California. Of those students, 112 participated in the questionnaire, which included questions about how many hours of sleep they got a night, how committed they were to athletics, whether strength training was part of their regimens, whether they liked playing sports and how many sports they played.
Researchers found that the teen athletes who got at least eight hours of sleep had a 68 percent lower risk of injury than those who got fewer hours. And the higher the grade of the student, the more likely he or she would suffer an injury -- with each advancing grade, injury risk went up by 2.3 times.
"When we started this study, we thought the amount of sports played, year-round play, and increased specialization in sports would be much more important for injury risk," study researcher Dr. Matthew Milewski, M.D., said in a statement. But "what we found is that the two most important facts were hours of sleep and grade in school."
The findings were presented at the national meeting of the American Academy of Pediatrics. Because the study has not yet been published in a peer-reviewed journal, its findings should be regarded as preliminary.
The National Sleep Foundation recommends that teens get more than nine hours of sleep per night (though some may only need closer to eight-and-a-half).
Also on HuffPost:
If you find yourself hungry all day (and not because you skipped breakfast or have recently amped up your gym routine) it might be because you've been skimping on sleep. Research presented at the 2010 meeting of the Society for the Study of Ingestive Behavior linked little shuteye with <a href="http://www.huffingtonpost.com/2012/07/10/sleep-hunger-deprivation-_n_1659954.html">higher levels of the hormone ghrelin</a>, the same one that triggers hunger, HuffPost reported. This uptick in the hunger hormone seems to lead to not only increased snacking, but also a hankering for <a href="http://www.sciencedaily.com/releases/2004/12/041206210355.htm">high-carb, high-calorie foods</a>, according to a 2004 study, which may help explain why people who don't get enough sleep are at a greater risk of obesity.
Ever find yourself tearing up over an embarrassing TV commercial? While women might be quick to blame PMS, it could be a lack of sleep sending your emotions into overdrive. A 2007 study found that sleep-deprived brains were <a href="http://usatoday30.usatoday.com/news/health/2007-10-22-sleep-deprivation-brain_N.htm">60 percent more reactive</a> to negative and disturbing images, <em>USA Today</em> reported. "It's almost as though, without sleep, the brain had reverted back to more primitive patterns of activity, in that it was <a href="http://berkeley.edu/news/media/releases/2007/10/22_sleeploss.shtml">unable to put emotional experiences into context</a> and produce controlled, appropriate responses," Matthew Walker, senior author of the study, said in a statement.
You're Forgetful Or Unfocused
You might be tempted to blame your trouble focusing on your age or stress or your overflowing email inbox, but a lack of sleep could be the true culprit. Too few hours in dreamland has been linked to a <a href="http://www.webmd.com/sleep-disorders/excessive-sleepiness-10/emotions-cognitive">whole host of cognitive problems</a>, like difficulty focusing and paying attention, confusion, lower alertness and concentration, forgetfulness and trouble learning, WebMD reports. So next time you find yourself forgetting where you put your keys, consider how much sleep you got last night.
You Can't Shake That Cold
If you keep coming down with the sniffles -- or can't seem to kick that never-ending case -- you might want to assess your sleep schedule. A 2009 study found that people who sleep fewer than seven hours each night have almost <a href="http://articles.latimes.com/2009/jan/17/science/sci-sleep17">three times the risk of catching a cold</a> than people who slept for at least eight hours, the <em>LA Times</em> reported.
You're Clumsier Than Usual
First you knock the alarm clock off the dresser, then you spill the milk as you're pouring your cereal, then you stub your toe on the way out the door -- you've become a klutz overnight. Researchers don't know exactly why, but sleepy people seem to <a href="http://www.prevention.com/amisleepdeprived/list/5.shtml">"have slower and less precise motor skills,"</a> Clete Kushida, M.D., Ph.D., director of Stanford University Center for Human Sleep Research told <em>Prevention</em>. Reflexes are dulled, balance and depth perception can be a little wonky and since you may also have trouble focusing, reaction time can be slowed, meaning you can't quite catch the egg carton before it hits the floor.
You've Lost That Lovin' Feeling
If you or your partner just can't get in the mood, and stress or an underlying health problem isn't to blame, you might want to spend some extra time between the sheets -- sleeping. Both men and women who don't get their 40 winks experience a <a href="http://www.webmd.com/sleep-disorders/excessive-sleepiness-10/10-results-sleep-loss">decreased sex drive</a> and less interest in doing the deed, WebMD reports. A lack of sleep can also <a href="http://www.everydayhealth.com/erectile-dysfunction/causes-of-low-libido.aspx">elevate levels of cortisol</a>, the stress hormone, according to Everyday Health, which doesn't help in the bedroom either.