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Updated: Jun 15, 2025

Visualization of Intensity Levels to Reduce the Gap Between Self-Reported and Directly Measured Physical Activity
Published on: March 7, 2019
Classroom intervention to improve behavioral intention toward regular physical activity among adolescents
Sweety Suman Jha1, Madhumita Dobe2, Chandrashekhar Taklikar2
1Community Medicine, Dr. B.C. Roy Multi-Speciality Medical Research Centre, Indian Institute of Technology Kharagpur, West Bengal, India.
A school-based intervention improved adolescents' intentions for regular physical activity. The study used the Theory of Planned Behavior to assess behavioral intentions, showing a 1.24 increased risk of becoming an intender in the intervention group.
Area of Science:
- Public Health
- Adolescent Health
- Behavioral Science
Background:
- Adolescence is crucial for establishing lifelong health habits.
- Physical inactivity is a major global risk factor for non-communicable diseases (NCDs).
- The Theory of Planned Behavior (TPB) assesses factors influencing behavioral intentions: Attitude, Subjective norm, and Perceived behavioral control.
Purpose of the Study:
- To evaluate the impact of a school-based health promotion intervention on physical activity behavioral intentions among urban adolescents.
- To apply the TPB framework to understand factors influencing physical activity intentions in adolescents.
Main Methods:
- A school-based nonrandomized controlled interventional study with a parallel group design was conducted.
- Participants aged 12-16 years were assessed using TPB constructs to measure behavioral intention.
- Cluster analysis classified participants as 'intenders' or 'non-intenders'; Relative Risk (RR) was calculated using a generalized linear model.
Main Results:
- Following the intervention, all TPB construct scores improved significantly in the intervention group, especially perceived behavioral control.
- The intervention group showed a Relative Risk (RR) of 1.24 (95% CI: 1.04-1.48) for becoming an intender for regular physical activity compared to the control group.
Conclusions:
- Health Promoting Schools are effective and cost-efficient for fostering healthy development and reducing physical inactivity.
- Schools should collaborate with stakeholders to overcome barriers and enhance control over health-related issues.
- Interventions targeting behavioral intentions can effectively promote physical activity among adolescents.
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