Accelerometer‐measured weekend catch‐up sleep and incident dementia: A prospective cohort study

Dec 19, 2025Alzheimer's & dementia : the journal of the Alzheimer's Association

Extra weekend sleep measured by activity trackers and the risk of developing dementia

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Abstract

During an average follow-up of 8.0 years, 713 participants developed all-cause dementia.

  • Moderate may be associated with a lower risk of developing dementia.
  • Participants who had 1-1.5 hours of weekend catch-up sleep showed the lowest risk for dementia.
  • The association between weekend catch-up sleep and dementia risk was stronger among individuals who slept less than 8 hours on weekdays.
  • No significant association was found for weekend catch-up sleep among those who averaged 8 or more hours of sleep on weekdays.

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Key numbers

0.64
Lower risk of dementia
for 1–1.5 hours of vs. ≤0.5 hours.
0.49
for weekday sleep < 8 hours
for 1–1.5 hours of catch-up sleep among participants with weekday sleep < 8 hours.
8.0 years
Median follow-up duration
Median duration of participant follow-up in the study.

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