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School start times should be put back to combat a sleep-deprivation crisis among young people, a scientist has suggested. Paul Kelley, of the Sleep and Circadian Neuroscience Institute at the University of Oxford, said young people in Britain were losing on average 10 hours‟ sleep a week, making them more sleep-deprived than a doctor on a 24-hour shift. Speaking at the British Science Festival in Bradford on Tuesday, Prof Kelley called for an end to early starts at schools, colleges and universities to “improve the lives of a generation”.
Kelley has been working with fellow Oxford neuroscientist Russell Foster and Steven Lockley of Harvard Medical School to push for a sea-change in the approach to sleep for children. They have been working with the Education Endowment Foundation and the Wellcome Trust on the Teensleep project, which Kelley said was the largest study of its kind and which aims to recruit 100 schools to trial different start times.
The recommendations arise from a deeper understanding of circadian rhythms—our internal body clock, which determines optimum levels of concentration, wakefulness and work ability. Ignoring our natural circadian rhythms could lead to exhaustion, frustration, anxiety, weight gain and hypertension, he said, and could make a person more prone to stimulant or alcohol use and risk-taking.
“This is a huge issue for the society,” Kelley said. “We are generally a sleep-deprived society, but the 14-24 age group is more sleep-deprived than any other sector of the society. This causes serious threats to health, mood performance and mental health.” The problem goes beyond merely feeling tired, Kelley said. Ira child gets less than six hours‟ sleep a night, over the course of a week this can lead to more than 700 changes in the way their genes behave.Similar changes are not seen in children who get eight-and-a-half-hour sleep a night. He said illnesses as serious as schizophrenia often developed at an age associated with the beginnings of sleep-deprivation problems.
Guy Meadows, a sleep physiologist at the Sleep School in London, agreed this was a problem that needed tackling.He said: “British children are among the most sleep-deprived in the world. There was a recent study which looked at 900,000 children globally. The US was top and Britain came the sixth. Sleep is vitally important to children, and it‟s when they develop mentally, physically and emotionally.”