A Pediatrics study of 401,000 U.S. students found that teen sleep has hit a 30-year low, with just 22% of 18- and 19-year-olds getting seven or more hours per night. Racial and socioeconomic disparities in sleep duration have grown significantly since the early 1990s.
Researchers at Tel Aviv University demonstrated that a small inertial sensor worn on the lower back over six nights at home can identify isolated REM sleep behavior disorder with 93% sensitivity — potentially catching a condition that converts to Parkinson's or dementia in more than 80% of cases.
A study of 1,206 adults using full overnight polysomnography found that both current smokers and former smokers had approximately 75% greater odds of more severe obstructive sleep apnea compared to people who never smoked — suggesting that airway changes from smoking persist years after quitting.
A Washington State University study tracking 112 adults over eight weeks found that chronic insomnia patients slept nearly the same total hours as healthy controls — but showed significantly greater night-to-night variability in sleep efficiency, onset latency, and overnight wakefulness.
A massive Nature study using 23 biological aging clocks found that both short and long sleep accelerate aging across the brain, heart, lungs, and immune system, with the optimal window varying by organ and sex.
A new study using Framingham Heart Study data found that a brain health score derived from a single night of sleep brain-wave recordings at midlife predicted cognitive performance an average of 12.6 years later.
A meta-analysis of more than 13,000 adults found that people with obstructive sleep apnea are 85% more likely to develop sarcopenia — and CT imaging studies show their muscles may be infiltrated with fat even when they appear normal in size.