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Association Between Accelerometer-Measured Physical Activity and Mobility Limitations in Twins.

Pia Pullinen1, Jari Parkkari1, Jaakko Kaprio2

  • 1Faculty of Sports and Health Sciences, University of Jyväskylä, Jyväskylä, Finland.

Journal of Aging and Physical Activity
|October 8, 2024
PubMed
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Physical activity decreases with increasing mobility limitations in older adults. Genetic factors may influence physical activity levels, suggesting personalized exercise programs for those with mobility challenges.

Area of Science:

  • Gerontology
  • Epidemiology
  • Biomedical Science

Background:

  • Limited research exists on the relationship between mobility limitations and objectively measured physical activity in older adults.
  • This study investigates these associations within a cohort of community-dwelling older twins.

Purpose of the Study:

  • To examine the association between mobility limitations and device-measured physical activity in older adults.
  • To explore the influence of genetic factors on physical activity levels in relation to mobility limitations.

Main Methods:

  • Cross-sectional study using data from the MOBILETWIN study (2014-2016).
  • 774 community-dwelling Finnish twins (mean age 73 years) participated.
  • Physical activity was assessed using hip-worn accelerometers, and mobility limitations via questionnaire.
Keywords:
device measurementgeneticsmobility difficultiessteps

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Main Results:

  • A significant association was found between mobility limitations and physical activity levels.
  • Participants with severe mobility limitations averaged 2,637 steps/day, compared to 7,074 steps/day for those without limitations (p < .05).
  • Within-twin pair analyses showed associations in dizygotic twins but not in monozygotic twins, suggesting potential genetic influences.

Conclusions:

  • Objectively measured physical activity is associated with mobility limitations in older adults.
  • Genetic factors may play a role in the variability of physical activity observed.
  • Personalized exercise interventions are recommended for older adults experiencing mobility difficulties.