This sleep deficit impacts everything from a person's ability to pay attention in class to his or her mood. According to the National Sleep Foundation’s 2006 Sleep in America poll, more than one quarter of high school students fall asleep in class, and experts have been able to tie lost sleep to poorer grades. Lack of sleep also damages teens' ability to do their best in athletics.
Slowed responses and concentration from lack of sleep don't just affect school or sports performance, though. More than half of teens surveyed reported that they have driven a car drowsy over the past year and 15% of students in the 10th to 12th grades drive drowsy at least once a week. The National Highway Safety Traffic Administration estimates that more than 100,000 accidents, 40,000 injuries, and 1,500 people are killed in the U.S. every year in crashes caused by drivers who are simply tired. Young people under the age of 25 are far more likely to be involved in drowsy driving crashes.
Lack of sleep has also been linked to emotional troubles, such as feelings of sadness and depression. Sleep helps keep us physically healthy, too, by slowing our body's systems enough to re-energize us after everyday activities.
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