Peer volunteers improve long-term maintenance of physical activity with older adults: a randomized controlled trial

J Phys Act Health. 2011 Sep;8 Suppl 2(Suppl 2):S257-66.


Background: Using peer volunteers as delivery agents may improve translation of evidence-based physical activity promotion programs for older adults. This study examined whether tailored support from older peer volunteers could improve initiation and long-term maintenance of physical activity behavior.

Methods: Participants were randomized to 2 16-week, group-based programs: (1) peer-delivered, theory-based support for physical activity behavior change; or (2) an intervention typically available in community settings (basic education, gym membership, and pedometer for self-monitoring), attention-matched with health education. Moderate-to-vigorous physical activity (MVPA) was assessed via daily self-report logs at baseline, at the end of the intervention (16 weeks), and at follow-up (18 months), with accelerometry validation (RT3) in a random subsample.

Results: Seven peer volunteers and 81 sedentary adults were recruited. Retention at the end of the trial was 85% and follow-up at 18 months was 61%. Using intent-to-treat analyses, at 16 weeks, both groups had similar significant improvements in MVPA. At 18 months, the group supplemented with peer support had significantly more MVPA.

Conclusions: Trained peer volunteers may enhance long-term maintenance of physical activity gains from a community-based intervention. This approach has great potential to be adapted and delivered inexpensively in community settings.

Publication types

  • Randomized Controlled Trial
  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't
  • Validation Study

MeSH terms

  • Acceleration
  • Aged
  • Aging / physiology*
  • Evidence-Based Practice
  • Female
  • Health Behavior
  • Health Knowledge, Attitudes, Practice
  • Health Promotion / methods*
  • Humans
  • Male
  • Mentors*
  • Middle Aged
  • Models, Theoretical
  • Motor Activity / physiology*
  • Peer Group*
  • Physical Fitness
  • Residence Characteristics
  • Sedentary Behavior
  • Self Efficacy
  • Social Marketing
  • Social Support
  • Surveys and Questionnaires
  • Time Factors
  • United States
  • Volunteers / psychology*