Tag
Wearables
Regular cannabis users had 9% fewer extra heartbeats on days they were randomly assigned to inhale
UC San Francisco cardiologists set out to test whether cannabis adds extra heartbeats. In 108 regular users the count fell instead, and the team warns that is no evidence cannabis is good for the heart.
Sep 14, 2026
One all-nighter hit driving harder than four short nights
A trial in SLEEP put the same 20 men through a night with no sleep, four nights of two hours less, and normal sleep, then a simulated dawn commute. The all-nighter degraded lane control within minutes. The gradual loss barely showed.
Aug 9, 2026
Women's night-time waking jumps sharply in midlife
A smartwatch study of 192,500 women across five countries found time spent awake after falling asleep rose 32% by the early sixties, a steeper climb than men saw.
Aug 6, 2026
Sleep of 7 hours tracked 30% lower death risk by watch and 14% by self-report
Everyone is told to get seven hours, advice built from questionnaires. Following 76,811 UK adults who both wore a tracker and estimated their own sleep, the healthiest amount and the size of the benefit each shifted with the method.
Jul 25, 2026