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Intervention to Reduce Sedentary Behavior During School Recess Among Adolescents
Sponsor: South China Normal University
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.
Official title: Effectiveness of an Intervention to Reduce Sedentary Behavior During School Recess Among Adolescents: A Cluster Randomized Controlled Trial
Key Details
Gender
All
Age Range
10 Years - 17 Years
Study Type
INTERVENTIONAL
Enrollment
1000
Start Date
2025-10-08
Completion Date
2026-07-30
Last Updated
2026-03-05
Healthy Volunteers
Yes
Interventions
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.
Locations (12)
Jingshi Liyun Experimental School
Foshan, Guangdong, China
Dongping Primary School, Foshan
Foshan, Guangdong, China
Zhixin Middle School (Pazhou Experimental School)
Guangzhou, Guangdong, China
Experimental Secondary School of Guangdong University of Foreign Studies
Guangzhou, Guangdong, China
Gaotangshi Primary School
Guangzhou, Guangdong, China
Guangdong University of Education (Panyu Affiliated Junior Secondary School)
Guangzhou, Guangdong, China
Overseas Chinese Town Primary School
Shenzhen, Guangdong, China
Lin Weimin Memorial Primary School
Zhuhai, Guangdong, China
Lihe Primary School
Zhuhai, Guangdong, China
Haikou No.9 Middle School
Haikou, Hainan, China
Pingyao Middle School - Junior High Division
Jinzhong, Shanxi, China
Pingyao Middle School - Primary Division
Jinzhou, Shanxi, China