Monday, June 9, 2008

Blame the Cell Phone, Early School Start Times for Teen Sleep Loss?

A research abstract being presented as a poster presentation today at SLEEP 2008 provides an interesting explanation for why some teens may not be sleeping well: They spend too much time on the cell phone.

The study of 21 teens (ID# 0249) shows that those who have more than 15 calls and/or 15 text messages a day are more likely to sleep poorly than teens who make less than five calls and/or send five text messages a day.

Excessive cell-phone users are more prone to disrupted sleep, restlessness, stress and fatigue. They also have more trouble waking up in the morning and are more tired before mid-day.

One member of the study group had more than 200 text messages per day. Only one of the 21 participants turned the cell phone off at night.

abstract presentation (ID# 0226) addresses a common cause of teen sleep loss: early school start times.

Following a 40-minute delay in the school start time from 7:35 a.m. to 8:15 a.m., students’ total sleep time on school nights increased by 33 minutes per night from 7 hours and 2 minutes to 7 hours and 35 minutes. Students went to bed about eight minutes later at night, but they slept in 41 minutes later in the morning, waking up at 6:53 a.m. instead of 6:12 a.m.

More students reported having “no problem” with
sleepiness after the schedule change.

American Academy of Sleep Medicine recommends that teens get a little more than nine hours of sleep each night to feel alert and well rested during the day.

The SLEEP 2008 abstract book is available online at


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  2. thats bullshit. teanagers have always stayed up late reguardless of a cell phone or not. its a reaction in the brain.

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