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Intervention to Reduce Sedentary Behavior During School Recess Among Adolescents

NCT07451535 · Status: ACTIVE_NOT_RECRUITING · Phase: NA · Type: INTERVENTIONAL · Enrollment: 1000

Last updated 2026-03-05

No results posted yet for this study

Summary

This cluster randomized controlled trial evaluated the effectiveness of an 8-week, school-based behavioural intervention grounded in the Multi-Process Action Control (M-PAC) framework in promoting interruption of sedentary behaviour during school breaks among adolescents. Twelve primary and secondary schools in China, were recruited and randomly allocated (at the school level) to either an intervention group or a control group to minimise contamination and support pragmatic delivery within the school setting. Schools assigned to the intervention group implemented a multi-component programme comprising educational materials, teacher-delivered guidance, peer reminders, and health lectures, whereas control schools continued their usual routines without receiving intervention materials. The primary outcome was interruption of sedentary behaviour during school breaks assessed using self-reported measures. Secondary outcomes included physical activity levels, emotional and behavioural problems, executive function, and psychological factors related to behaviour regulation, such as motivation, planning, and habit. Findings from this trial are intended to inform the development and implementation of feasible, theory-informed school strategies to reduce sedentary behaviour during school breaks.

Conditions

  • Sedentary Behaviour
  • Physical Activity
  • Adolescents
  • School-based Intervention

Interventions

BEHAVIORAL

Sedentary Interruption Intervention

A multi-component, school-based behavioural program implemented over 8 weeks to promote interruption of sedentary behaviour during school breaks. The program was informed by the Multi-Process Action Control framework and designed to support behaviour regulation related to break-time sedentary interruption. 1. Educational leaflets (weekly): brief printed materials distributed once per week, providing information on sedentary behaviour and practical strategies to interrupt sitting during school breaks. 2. Teacher guidance: physical education (PE) teachers provided brief guidance and reinforcement of key messages during routine school activities/classes, encouraging students to interrupt sedentary time during breaks. 3. Peer reminders during school breaks: reminders were delivered by class-appointed student PE representatives. 4. Health lectures: health lectures were delivered by members of the research team during the intervention period to support awareness and and motivation.

Sponsors & Collaborators

  • South China Normal University

    lead OTHER

Principal Investigators

  • Ru ZHANG · South China Normal University

Study Design

Allocation
RANDOMIZED
Purpose
OTHER
Masking
SINGLE
Model
PARALLEL

Eligibility

Min Age
10 Years
Max Age
17 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2025-10-08
Primary Completion
2026-07-30
Completion
2026-07-30

Countries

  • China

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT07451535 on ClinicalTrials.gov