Sleep
Sleep, insomnia and the body clock, read from the trials.
Sleep
Half an hour of light after bedtime, and a thicker heart wall
A wrist sensor measured light after bedtime for seven days rather than asking anyone to remember it. In the 11,071 UK Biobank adults whose hearts were later scanned, the most exposed group, an average of 33.9 minutes above 3 lux a night, carried 2.4 percent more left ventricular mass and 1.5 percent greater wall thickness than the group that logged none. Across the wider 73,286, heart failure ran at 361 cases per 100,000 person-years against 218. The study is observational and cannot show the light did it.
Sleep
Sleep apps beat doing nothing, and lose to a person
A review of 29 randomised trials found app-delivered insomnia therapy works. Where trials put it directly against a human therapist, the human won.
