A 19-year study links one sleep behavior to reduced mortality risk. Researchers tracked sleep patterns in a large population and found that people who napped excessively faced higher death rates from all causes compared to those who napped rarely or not at all.
The study controlled for factors like age, sex, and existing health conditions. Excessive daytime napping, defined as sleeping more than one hour daily, showed the strongest association with increased mortality. This held true even after accounting for nighttime sleep quality and duration.
The finding doesn't prove napping causes early death. Instead, excessive daytime sleepiness often signals underlying health problems. Conditions like sleep apnea, cardiovascular disease, and depression all produce daytime fatigue and increase mortality risk independently.
Researchers caution against interpreting this as a reason to avoid short naps. Brief naps under 30 minutes offer documented cognitive and physical benefits. The concern centers on chronic, excessive daytime sleepiness as a warning sign.
If you experience persistent fatigue despite adequate nighttime sleep, doctors recommend getting evaluated. This symptom warrants investigation for sleep disorders, heart problems, or other treatable conditions rather than simply accepting it as normal aging.