Sleep study links short duration to increased disease risk

A large-scale study involving 95,559 participants from the UK Biobank has linked sleeping fewer than five hours per night to an increased risk of dozens of health conditions. The research, which monitored adults for approximately nine years using wrist-worn accelerometers, suggests that both sleep duration and sleep structure are critical to long-term health.

Researchers utilized deep learning algorithms to analyze sleep stages, including REM, deep, and light sleep. The findings indicated that increased REM sleep is associated with a lower risk of 83 different diseases. Specifically, every additional 47.6 minutes of REM sleep was linked to a 26% lower risk of heart failure, a 46% lower risk of dementia, and an 80% lower risk of Parkinson’s disease.

Furthermore, increased deep sleep was associated with a reduced risk for seven conditions, including type 2 diabetes and major depressive disorder. Conversely, sleep instability—characterized by fluctuations in sleep patterns from night to night and prolonged periods of wakefulness after falling asleep—was linked to higher risks of anxiety and substance use disorders. As an observational study, the results show correlations rather than direct causation.