WEDNESDAY, Nov. 9, 2016 (HealthDay News)—If you're in need of a good night's sleep, it might be wise to give your smartphone a rest from time to time.
New research suggests that the light from smartphones, especially before bedtime, may affect how long and well you sleep.
During the month-long study, participants used their cellphones an average of 38 hours—nearly 4 minutes each hour. And the more screen-time people spent with their phones, the poorer and shorter their sleep, particularly if they used their smartphones near bedtime, the researchers said.
"A substantial amount of our time is spent engaging with smartphones," said study senior researcher Dr. Gregory Marcus. "These may have important health effects, including influencing fundamental needs, such as our ability to acquire and maintain a good night's sleep," added Marcus. He is director of clinical research in the division of cardiology at the University of California, San Francisco.
Fitful sleep has been linked to health problems such as obesity, diabetes and depression, the study authors said.
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