Most high school students are chronically tired. They juggle school, sports, homework, chores, friends and family.
To meet all of these demands, surveys show, high schoolers usually stay up close to midnight on school nights. And then they have to get up early the next morning, typically around 6 or 6:30 a.m., to get to school on time, as most high schools start classes around 7:30 a.m.
By Friday, most teens are very tired, says Dr. Helene Emsellem, a sleep researcher with George Washington University in Washington, D.C. And then comes the weekend.