Researchers at the Cincin­nati Chil­dren’s Hos­pi­tal Med­ical Cen­ter have found no evi­dence that Night Shift on a smart­phone improves sleep in any way.

It is believed that the blue col­or of the screen impairs the pro­duc­tion of mela­tonin and dis­rupts the cycles of sleep and wake­ful­ness. In 2016, Apple added Night Shift to its iOS devices, which adjusts the screen to warmer col­ors in the evening. Then there were phones with the Android oper­at­ing sys­tem, equipped with a sim­i­lar func­tion. It is believed that such a night mode improves the process of falling asleep and the qual­i­ty of sleep.

The study involved 167 peo­ple aged 16–24 who use smart­phones dai­ly. They had to spend at least 8 hours a day in bed and wear an accelerom­e­ter on their wrist to mea­sure activ­i­ty. Also, using a spe­cial appli­ca­tion, sci­en­tists tracked how they use the phone.

The sci­en­tists divid­ed the sub­jects into three groups: those who used the phone at night with Night Shift turned on; those who did not use this fea­ture; those who did not use the smart­phone at all before going to bed. They did not find any dif­fer­ence between the groups.

Then the sub­jects were divid­ed into two groups: one slept about 7 hours per night, and the oth­er — less than 6 hours. In this case, there was a slight dif­fer­ence. Those who slept for 7 hours (which is clos­er to the rec­om­mend­ed 8–9 hours) slept bet­ter if they did not pick up the phone at all, and worse if they used it before bed, regard­less of the inclu­sion of Night Shift. The group that slept less than 6 hours showed no dif­fer­ence in the qual­i­ty and quan­ti­ty of sleep, with or with­out a phone, with or with­out Night Shift.

Thus, the Night Shift mode does noth­ing to help a per­son fall asleep or sleep bet­ter.

От Yraa

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