Report Research indicates later start times could help Canadian teens’ grades and health

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Delaying school start times could help Canadian teenagers sleep better – giving them a better chance for success, according to McGill University researchers.


In a study published in the Journal of Sleep Research, the researchers found that students from schools that started earlier slept less, were less likely to meet the national sleep recommendations for their age, and were more often tired in the morning. The findings help explain why, according to recent data, one in three Canadian teenagers don’t get enough sleep.

“It is time that we have a conversation about school start time in Canada,” says lead author Geneviève Gariépy, a post-doctoral student in McGill’s Institute of Health and Social Policy.

“The problem is that early school start times conflict with the natural circadian clock of teenagers,” Gariépy says. “As teenagers go through puberty, their circadian clock gets delayed by two to three hours. By the time they reach junior high, falling asleep before 11 p.m. becomes biologically difficult, and waking up before 8 a.m. is a struggle. Adolescents are fighting biology to get to school on time.”

Previous research internationally has shown that teenagers who are sleep-deprived do worse at school, have more health problems, and are more vulnerable to depression, anxiety and behavioural problems.

The McGill researchers used Canadian data covering 30,000 students from 362 schools across Canada, from a cross-national survey conducted every four years in more than 40 countries in collaboration with the World Health Organization.

Read more here. (McGill)
 
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