New research reveals that irregular bedtimes and insomnia during teenage years may increase health risks well into early adulthood, emphasising the importance of establishing consistent sleep routines early in life.
New research suggests that poor sleep in the teenage years may have consequences well into early adulthood, with irregular bedtimes and insomnia linked to worse health outcomes at age 22. The findings add to a growing body of evidence that sleep is not just about getting enough hours in bed, but also about keeping a consistent routine and avoiding repeated disruption. Previous studies have already shown that insomnia is common among adolescents and can have lasting effects on health, daily functioning and wellbeing.
In the latest work, researchers tracked almost 300 teenagers with wrist-based actigraphy, a method that measures movement to estimate sleep patterns, and assessed insomnia in a separate group of more than 2,000 young people. They then looked at overnight hospital stays, overall health and life satisfaction at ages 15 and 22. The results showed that young adults were almost 2.5 times more likely to have had a hospital admission in the previous year if, at 15, they had a greater mismatch between weekday sleep timing and their natural body clock. Risk was about twice as high among those whose bedtime varied more from night to night, and 66% higher among teenagers who reported difficulty falling asleep at least two nights a week.
That pattern fits earlier research. A study published in Sleep found that more than a quarter of adolescents reported at least one insomnia symptom, while about 5% met diagnostic criteria for insomnia. It also linked chronic insomnia with later somatic, psychological and interpersonal problems, alongside difficulties in day-to-day activities. Another US study found that nearly one-third of adolescents had insomnia symptoms for at least two weeks in the previous year, and that the complaints were associated with depression, anxiety and substance use disorders. Separate research has also tied adolescent sleep problems to short sleep, inflammation, poor sleep hygiene and other factors such as late chronotype and social jetlag.
The authors said the message for families is straightforward: sleep health matters early, and not only in terms of duration. Regular timing, good quality and an absence of insomnia symptoms all appear to be important. They advised that teenagers aged 13 to 18 should aim for a steady 8 to 10 hours of sleep a night. “Improving sleep regularity and easing insomnia symptoms in young people may protect the health of young adults, their wellbeing and overall quality of life,” Dr Gina Marie, the study’s lead author, said. “Our findings highlight how important it is to address sleep health early, because its potential effect on other aspects of health and wellbeing can persist into early adulthood,” she added.
Disclaimer: This content is for informational purposes only and is not intended to be a substitute for professional medical judgment, advice, diagnosis, or treatment.
