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Cognitive function and the agreement between self-reported and accelerometer-accessed physical activity.

Florian Herbolsheimer1, Matthias W Riepe2, Richard Peter3

  • 1Institute of the History, Philosophy and Ethics of Medicine, Ulm University, Parkstraße 11, 89073, Ulm, Germany. florian.herbolsheimer@uni-ulm.de.

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Cognitive function influences how older men report physical activity. Higher cognitive function in men was linked to reporting less physical activity than measured by accelerometers, suggesting recall bias.

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AccelerometerCognitive functionPhysical activityPhysical activity questionnaire

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Area of Science:

  • Gerontology
  • Behavioral Science
  • Biomedical Engineering

Background:

  • Self-reported physical activity often shows weak correlations with objective measures.
  • Cognitive factors, such as memory, may introduce bias in self-reporting.
  • Understanding these biases is crucial for accurate physical activity assessment in older adults.

Purpose of the Study:

  • To investigate the association between cognitive function and discrepancies between self-reported and accelerometer-assessed physical activity.
  • To determine if cognitive function explains differences in physical activity reporting in older adults.

Main Methods:

  • Utilized cross-sectional data from 1172 community-dwelling older adults (aged 65-90) from the ActiFE study.
  • Assessed physical activity using accelerometers (activPAL) and the LASA Physical Activity Questionnaire (LAPAQ).
  • Measured cognitive function using memory and fluency tests (CERAD-TS).

Main Results:

  • A significant negative correlation was found between cognitive function and the difference between self-reported and accelerometer-assessed physical activity in men (r=-.12, p=.002).
  • Multiple linear regression revealed that higher cognitive function was associated with lower reported physical activity in men (β=-.13, p=.015).
  • No significant association was observed in women.

Conclusions:

  • Cognitive function is a significant factor contributing to the disparity between self-reported and objectively measured physical activity in older men.
  • Self-reported physical activity data in older populations require careful interpretation due to potential cognitive influences.
  • Recall bias related to cognitive function may lead to underreporting of physical activity in men.