Study reveals how disrupted sleep is a major problem even though many people are getting the recommended 7-9 hours in bed10:03, 28 Jul 2026Updated 10:30, 28 Jul 2026Waking up in the night due to work stress is a major problem once people are aged over 50, new research suggests‌A year-long study of older workers by Edinburgh University discovered for the first time that regular sleep disturbances - rather than lack of sleep duration - are why people feel poorly rested. This lack of sleep quality appeared to be linked to workplace stresses, which also had a big impact on general wellbeing.‌Researchers tracked 45 workers aged 50 to 66 doing different jobs who wore wearable sensors as well as filling out regular wellbeing and workplace assessments.‌Almost 70% of participants experienced persistent, clinically significant sleep problems, despite having no diagnosed history of sleep disorders. This was despite participants averaging between 6.5 and 8 hours of sleep a night.Researchers say it poses serious questions for Britain’s aging population about how we keep older adults well and working for the health of the economy.‌Study lead Athanasios Tsanas, professor of data science at the university, said: “Having spent years analysing data from patients with clinical sleep and mental health disorders, I was genuinely surprised by the sheer scale of sleep problems we uncovered in this otherwise undiagnosed group.“Our analysis clearly demonstrates that many of these sleep and wellbeing issues are work-related, with overall wellbeing heavily dependent on sustained work-life balance.”Until now the big focus has been on getting the recommended seven to nine hours of sleep a night.‌Sleep is crucial for healing tissues and strengthening the immune system while the brain clears out waste and locks in the previous day’s memories. An uninterrupted couple of hours’ deep sleep - soon after nodding off - are crucial for these health benefits.Most over 50s appeared to be getting enough sleep but the study collected 5,200 days of wearable sensor data showing it was often too disrupted. Some 92% of participants met the clinical threshold for a sleep disorder at least once during the study.‌Researchers collected more than 1,900 self-reported wellbeing and workplace assessments. Most people scored highly in the items “feeling loved” and “dealing with problems” but lower for having levels of energy to spare and feeling relaxed.Analysis used artificial intelligence to assess the factors most strongly associated with sleep disruption. Workplace experiences were one of the most important factors.Co-author Dr Belinda Steffan said: “While we knew from previous evidence that sleep can influence work, and work can influence sleep, we were surprised by the extent to which our non-clinical study population were struggling with their sleep.‌“While there are certainly some age-related sleep disruptors, such as menopause and bodily ageing, there are also many wider factors such as care-related stress, financial stress and wider non-age-specific work-related stress.“Our study highlights that sleep is a workplace health and wellbeing issue. Organisations and employers must consider the impact of work-related sleep problems on their workforce, focusing on workers over 50.”The UK has an aging population with a growing percentage of pensioners compared to people in employment - who generally pay more tax. By 2050 the UK will have 17.7 million people aged over 65 and keeping them in the workforce would be good for the public purse.Article continues belowThe experts say employers and policymakers should place greater emphasis on sleep quality, workplace wellbeing and work-life balance.Prof Tsanas added: “By utilising longitudinal smartwatch data, we captured nuanced, previously unexplored patterns. Crucially, these findings point to actionable intervention strategies, offering a roadmap to help people build healthier, more sustainable lives as they get closer to the transition into retirement.”