New research suggests that how—and when—older adults nap may be a significant indicator of their overall health and longevity. A long-term study has found that excessive, frequent, or early-morning napping is closely associated with an increased risk of mortality.
The Study: Moving Beyond Self-Reporting
While many previous studies on sleep relied on participants’ own memories (which can be inaccurate), this research utilized objective data. Researchers from Mass General Brigham and Rush University Medical Center tracked 1,338 older adults over a 19-year period.
To ensure accuracy, participants wore wrist-based activity monitors to precisely record their rest-activity cycles. This allowed the team to move past general observations and analyze specific metrics:
* Duration: How long each nap lasted.
* Frequency: How many times a person napped per day.
* Timing: What time of day the naps occurred.
Key Findings and Risk Factors
The study, published in JAMA Network Open, identified three specific napping patterns that correlate with a higher risk of death:
- Longer Naps: For every additional hour spent napping during the day, mortality risk increased by approximately 13%.
- Frequent Naps: Each extra nap taken per day was associated with a 7% increase in mortality risk.
- Morning Naps: Perhaps most notably, individuals who napped in the morning faced a 30% higher risk compared to those who napped in the afternoon.
Interestingly, the study found that the variability of nap timing (how much the schedule changed from day to day) did not appear to impact mortality rates.
Correlation vs. Causation: What This Means for Health
It is critical to understand that napping itself may not be the cause of death. Instead, excessive napping likely acts as a “red flag” for other underlying issues.
As lead author Dr. Chenlu Gao explains, these patterns are likely symptoms of:
* Neurodegeneration (such as Alzheimer’s or other cognitive declines).
* Cardiovascular diseases.
* Circadian dysregulation (disruptions to the body’s internal clock).
* Chronic underlying medical conditions.
“Our study is one of the first to show an association between objectively measured nap patterns and mortality… suggesting there is immense clinical value in tracking napping patterns to catch health conditions early.” — Dr. Chenlu Gao, Mass General Brigham
Why This Matters
This research shifts the conversation from viewing napping as a simple lifestyle choice to viewing it as a clinical metric. If napping patterns can predict health decline, doctors could potentially use wearable technology to monitor sleep behavior as a non-invasive way to detect early signs of disease.
Conclusion: While occasional naps are normal, frequent and long naps—particularly in the morning—may signal underlying physiological or neurological issues in older adults. Monitoring these patterns offers a potential new pathway for early medical intervention and disease prevention.
