Tired teens exposed to bright light in the morning can improve alertness

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Tired teens exposed to bright light in the morning can improve alertness

Exposing sleepy teens to bright light in the morning can improve their sleep and help them feel more alert during the day, a Flinders University study shows.

Researchers investigated an innovative way to cure teenagers of Delayed Sleep-Wake Phase Disorder, a common condition in which adolescents struggle to get to sleep, wake late and feel drowsy during the day.

They enlisted 60 adolescents and young adults with the condition. Half wore portable glasses that exposed them to doses of green bright light while the other half received a red light. Some students also did mild morning exercise.

Researchers analysed sleep timing, sleep quality and day-time functioning both pre- and post-treatment.

“After light therapy, adolescents were able to fall asleep and wake up earlier and they slept longer,” says lead researcher Cele Richardson.

The treatment also reduced sleepiness, fatigue and depressive symptoms, she says.

However, the colour of the light did not alter treatment outcomes and the mild morning exercise offered no additional benefits.

It is possible that morning exercise of a higher intensity or longer duration could help to improve teen’s sleeping patterns, and the research team are hoping to answer this question in another study underway.

“Given that these adolescents had experienced their sleep problem for approximately 3.5 years, it is exciting to discover that three weeks of light therapy can meaningfully improve adolescents’ sleep and daytime functioning,” Miss Richardson says.

“That’s a result that many parents will be happy to hear.”

(Source: Flinders University)

Date Created: November 10, 2017 Date Modified: November 14, 2017

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