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The Park RX RCT: Impact on Physical Activity Among Youth.

Deborah A Cohen1, Robert Zarr2, Erika Estrada1

  • 1Department of Research and Evaluation, Kaiser Permanente Southern California, Pasadena, California.

American Journal of Preventive Medicine
|October 16, 2025
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Summary
This summary is machine-generated.

Clinician prescriptions for park visits increased moderate-to-vigorous physical activity (MVPA) in low-income youth by over 12%. This Park Rx intervention shows promise for improving children's health and should be widely adopted.

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Area of Science:

  • Public Health
  • Pediatrics
  • Preventive Medicine

Background:

  • Most youth do not meet recommended physical activity levels, impacting health.
  • Effective interventions to increase youth physical activity are needed.

Purpose of the Study:

  • To determine if clinician prescriptions for park visits increase physical activity in youth.
  • To evaluate the impact of the Park Rx intervention on physical activity and health indicators.

Main Methods:

  • Randomized controlled trial (RCT) conducted from 2020-2023 with 12-month follow-up.
  • Participants: Youth aged 6-16 years with chronic conditions at a federally qualified health center.
  • Intervention: Clinician prescriptions for park visits during routine healthcare appointments.

Main Results:

  • Intent-to-treat analysis showed a significant increase in daily moderate-to-vigorous physical activity (MVPA) by over 12% at 3 and 6 months.
  • MVPA increases were more pronounced in boys and adolescents aged 11-16 years.
  • No significant changes were observed in BMI or blood pressure; park visit self-reports increased.

Conclusions:

  • Park prescriptions (Park Rx) positively impact MVPA in low-income youth.
  • The intervention is likely beneficial and warrants widespread adoption by healthcare providers.
  • Further research should replicate this promising intervention for youth physical activity.