One Sleep Habit Could Boost Your Heart Health, Study Suggests

Wearables tracked sleep for a week in 3,231 people aged 46.

Those sleeping under eight hours were grouped as regular, fairly regular, or irregular.

Irregular sleepers had double the risk of a serious cardiac event over the next decade versus regular sleepers.

Greater variability in sleep midpoint and higher bedtime variability (irregular 108 min vs regular 33 min) were linked to worse heart health.

The risk link appeared only among those getting less than eight hours of sleep; wake-up times didn’t matter.