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Related Experiment Video

Updated: Jun 13, 2025

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Friend Social Network Size Moderates the Association Between Age and Physical Activity Across Adulthood.

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Area of Science:

  • Gerontology
  • Social Psychology
  • Public Health

Background:

  • Physical activity and social network size decrease with age.
  • Limited research explores how social networks influence physical activity across adulthood.

Purpose of the Study:

  • To investigate if social network size and contact frequency moderate the age-physical activity relationship.
  • To understand how different social network characteristics impact physical activity levels throughout adulthood.

Main Methods:

  • Multiple regression analyses were used.
  • Examined main effects of age and physical activity (past week/year).
  • Assessed moderation by friend/relative network size and contact frequency.

Main Results:

  • Friend network size moderated age-physical activity links for both past-week and past-year activity.
  • Older adults with smaller friend networks and younger adults with larger networks showed more moderate-vigorous physical activity (MVPA).
  • Relative network size, friend contact frequency, and relative contact frequency did not show moderating effects.

Conclusions:

  • Friend network size plays a crucial role in maintaining physical activity across the adult lifespan.
  • Strategies to build and maintain friend networks may support active living in aging populations.
  • Findings highlight the interplay between social connections and physical health in later life.