Scientists from Montreal are alarmed in earnest: adolescents have never had such problems with sleep, as in recent years. Children spend less time in bed, often get up in the middle of the night, and literally sleep on the go during the day. A study conducted by Canadians, says: all to blame for gadgets. Or rather, their uncontrolled use.Photo:GettyImagesThe experiment showed that teenagers who texted friends on the phone before going to bed slept poorly. Those who watched TV or played computer games for more than two hours slept less than eight hours. Then the kids complained of fatigue and drowsiness. And the children who read books at that time slept longer and felt more energetic. Surprisingly, even long chatter on the phone can disrupt a child's biorhythms, and then you can forget about healthy sleep. "Children need to sleep to grow," warns Christina Calamaro, director of research at the Alfred duPont Children's Hospital in Wilmington, Delaware, USA. "Otherwise, problems with thinking and attention will begin, and the risk of obesity and depression among young people will increase. Scientists urge parents to control the time their children spend in front of the screen. Prohibitions are unlikely to help, but a reasonable explanation about the harm to health will come in handy.