Morning Naps in Seniors Linked to 30% Higher Mortality Risk; Wearable Data Identifies Sleep Timing as New Health Marker

Seniors who nap in the morning have a 30% higher mortality risk than afternoon nappers, according to a new JAMA study using wearable trackers.

By: AXL Media

Published: Apr 22, 2026, 4:55 AM EDT

Source: Information for this report was sourced from JAMA Network Open and Rush Memory and Aging Project (MAP).

The Precision of Wearable Sleep Tracking While daytime napping is common among older adults—affecting approximately 60% of the population—new research indicates that the characteristics of these naps can be a "behavioral mirror" reflecting internal health. Unlike previous studies that relied on subjective self-reporting, this study utilized wrist-worn actigraphy to objectively track the sleep patterns of 1,338 seniors (mean age 81.4) for up to 14 days. This high-resolution data allowed researchers to move beyond simple duration to examine frequency, timing, and day-to-day variability.

Morning Naps: A Circadian Red Flag The most striking finding of the study was the impact of nap timing. Participants who favored morning naps showed a 30% higher mortality risk than those who napped in the early afternoon. Researchers hypothesize that morning naps may signal a severe disruption of the body's natural circadian rhythms. While an early afternoon "siesta" is often a restorative response to the post-lunch dip, needing to sleep shortly after waking in the morning likely indicates more profound physiological distress or poor nighttime sleep quality that could be a harbinger of larger health issues.

The Cumulative Risk of Duration and Frequency The study quantified the risk associated with daily napping habits through a follow-up period averaging 8.3 years. Key findings include:

Duration: Every additional hour of daytime napping was associated with a 13% increase in mortality risk—an effect equivalent to being one year older.

Frequency: Each additional nap taken throughout the day raised the likelihood of death by 7%.

Consistency: Interestingly, day-to-day variability in nap duration (napping for different lengths of time each day) was not significantly associated with increased risk, suggesting that the amount and timing of sleep are more critical than its regularity.