7:1 sleep rule linked to longer life and six habits to reset your body clock

A 2026 Vitality–LSE study reported that keeping bedtimes within a one-hour window and getting 7+ hours of sleep was associated with lower mortality risk and up to four extra years of life. Sleep experts describe six circadian anchors—consistent wake time, morning light, regular meals, daytime activity, a bedtime routine and reduced evening light—to support sleep regularity.

A recent 2026 study from Vitality and the London School of Economics and Political Science found an association between sleep regularity, seven-plus hours of sleep, and lower mortality risk. The finding is being discussed during Sleep Awareness Week 2026 and prompted interviews with three sleep experts about how to support a stable body clock. The experts describe six circadian rhythm "anchors" that help the internal clock stay synchronized. The piece also outlines a short "3-day circadian anchor challenge" that was presented as a way to test those anchors. Key facts: - The 7:1 sleep rule reported in the study refers to falling asleep within a one-hour window and getting at least 7 hours of sleep on most nights. - The Vitality–LSE analysis reported that those sleep patterns were associated with a lower mortality risk and a potential increase in life expectancy of up to four years. - Six circadian anchors named by experts are: a consistent wake-up time, morning natural light exposure, regular meal times, daytime physical activity, a consistent bedtime routine, and reduced evening light and screen use. - Morning light exposure of about 10–30 minutes and waking within an hour of that light were described as cues that help time melatonin release roughly 14–16 hours later. - Experts noted that regular meals help synchronize peripheral metabolic clocks, and that exercise earlier in the day can reinforce sleep timing while intense late exercise may be activating. Summary: The study connected consistent bedtimes and sufficient sleep with lower mortality risk and a potential life expectancy increase, and experts outlined six practical anchors that they say support sleep regularity. A brief three-day challenge was presented as a way to apply those anchors and observe changes. Undetermined at this time.