A large observational study links irregular sleep patterns with cardiovascular risk, while established advice still starts with enough rest and a workable routine.
Researchers reported that inconsistent sleep patterns were associated with a higher risk of cardiovascular problems in a study of more than one million nights of wearable data from 10,362 adults in the NIH All of Us programme. Participants were followed for a median 3.7 years.
There are important limits: this observational research cannot establish that changing a bedtime will prevent a heart attack. The findings are a conference abstract, not yet a peer-reviewed full paper, and sleep was measured with wearables rather than laboratory brain monitoring.
CDC guidance recommends consistent sleep and wake times, a quiet comfortable bedroom, switching off electronic devices at least 30 minutes before bed and avoiding caffeine later in the day. Adults aged 18–60 generally need at least seven hours of sleep. Persistent sleep problems merit discussion with a healthcare professional.
Sources: American Heart Association study summary; CDC sleep guidance. Editor note: Do not use a causal headline, individual-risk prediction or smartwatch-diagnosis claim.
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