Most people think nothing of an aging parent dozing off in the early hours of the day. But researchers at Boston’s Mass General Brigham healthcare system are urging families to pay closer attention, because frequent and lengthy napping in older adults may point to something far more serious lurking beneath the surface.
A new study tracking more than 1,330 people over nearly 19 years found that longer and more frequent naps, particularly those happening in the morning, are associated with a meaningfully higher risk of death and underlying illness. The findings build on earlier research that had already connected excessive napping to reduced cognitive function and cardiovascular strain.
The numbers are striking. Each additional hour of napping was linked to a 13 percent higher risk of death, and each extra nap added another 7 percent to that risk. Perhaps most notably, people who napped in the morning faced a 30 percent greater mortality risk compared to those who napped in the afternoon.
What the research actually tells us
The study drew its data from the Rush Memory and Aging Project, a long-running research effort that began in 1997 and followed primarily white adults over the age of 56 in northern Illinois. Participants wore wrist activity monitors for 10-day stretches beginning in April 2005, repeating the process annually for nearly two decades. That continuous data collection gave researchers an unusually detailed picture of how sleep patterns shifted over time and how those shifts correlated with health outcomes.
Researchers were careful to note that the relationship they identified is one of correlation rather than causation. Excessive napping is more likely a symptom of underlying trouble than a cause of it. Chronic conditions including diabetes, cardiovascular disease, respiratory illness, chronic pain, metabolic syndrome, mood disorders and neurodegeneration can all trigger fatigue and push the body toward more frequent rest as a coping response. Sleep disorders and disrupted circadian rhythms may also play a role.
The study did not account for nap quality, racial diversity among participants, or the patterns of shift workers, and the researchers acknowledged that more investigation is needed to fully understand those gaps.
Napping as an early warning tool
One of the study’s most promising takeaways is the potential for wearable technology to serve as an early detection tool. Because the research relied on wrist monitors to objectively measure rest, the team believes that routine daytime nap tracking could eventually help clinicians catch declining health before it becomes critical. The researchers pointed to a 2022 study that previously connected excessive napping to an increased risk of Alzheimer’s disease as further evidence that sleep patterns carry diagnostic weight.
The hope is that identifying troubling nap behavior early could give families and physicians a window to intervene sooner, potentially slowing or redirecting a health trajectory before it worsens.
How much napping is actually okay
For older adults who do nap, timing and duration matter significantly. Sleep experts generally recommend keeping naps to between 15 and 20 minutes, and ideally no longer than 30. Napping before 2 or 3 in the afternoon is considered optimal since it is less likely to interfere with nighttime sleep.
The broader guidance from medical professionals is not to eliminate napping altogether, since short rest periods can genuinely restore energy and sharpen focus. The concern arises when napping becomes a persistent, hours-long habit, especially in the earlier part of the day, which research now suggests may warrant a closer look from a doctor.
Between 20 and 60 percent of older adults nap regularly, making this a conversation that millions of families may need to start having sooner than they think.
