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Related Experiment Video

Updated: May 14, 2026

Visualization of Intensity Levels to Reduce the Gap Between Self-Reported and Directly Measured Physical Activity
05:59

Visualization of Intensity Levels to Reduce the Gap Between Self-Reported and Directly Measured Physical Activity

Published on: March 7, 2019

Intervention effects on physical activity: the HEIA study - a cluster randomized controlled trial.

May Grydeland1, Ingunn Holden Bergh, Mona Bjelland

  • 1Department of Nutrition, Faculty of Medicine, University of Oslo, Oslo, Norway. may.grydeland@nih.no

The International Journal of Behavioral Nutrition and Physical Activity
|February 6, 2013
PubMed
Summary

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A school-based intervention increased adolescent physical activity by 50 cpm. The positive effects were most significant for girls, low-active students, normal-weight participants, and those with middle parental education levels.

Area of Science:

  • Adolescent Health
  • Physical Activity Promotion
  • Public Health Interventions

Background:

  • School-based interventions are crucial for promoting physical activity in adolescents.
  • Effectiveness and target populations for these interventions require further investigation.

Purpose of the Study:

  • To evaluate the HEalth in Adolescents (HEIA) study's impact on physical activity.
  • To explore intervention effects based on gender, weight status, activity level, and parental education.

Main Methods:

  • Cluster randomized controlled trial with 700 11-year-olds over 20 months.
  • Objective measurement of physical activity using accelerometers (mean count per minute).
  • Linear mixed models used to analyze intervention effects, accounting for school clustering.

Related Experiment Videos

Last Updated: May 14, 2026

Visualization of Intensity Levels to Reduce the Gap Between Self-Reported and Directly Measured Physical Activity
05:59

Visualization of Intensity Levels to Reduce the Gap Between Self-Reported and Directly Measured Physical Activity

Published on: March 7, 2019

Main Results:

  • Overall physical activity increased by 50 cpm in the intervention group (p=0.05).
  • Greater effects observed in girls, low-active adolescents, normal-weight participants, and those with middle parental education.
  • Intervention reduced sedentary time in girls but not boys.

Conclusions:

  • A feasible, multi-component school intervention effectively increases adolescent physical activity.
  • Intervention benefits were more pronounced in specific subgroups: girls, low-active, normal-weight, and middle-education families.
  • School implementation of HEIA components can improve public health by boosting adolescent physical activity.