1\. Study Population 1. Sample Size: 20 classes, about 800-1000 children. 2. Randomization: This study will adopt a cluster-randomized controlled intervention design. 20 Classes will be randomly assigned in a 1:1:1:1 ratio to one of four groups: the graphic-text intervention group, the video intervention group, the AI dialogue intervention group, and the control group. The randomization process will be centralized and conducted by personnel not involved in the project. 3. Inclusion Criteria (all of the following must be met for inclusion): Both children/adolescents and their parents are willing to participate and demonstrate good compliance. Children/adolescents have a weight classified as normal, overweight, or obese. Age range: 11 to 13 years. Informed consent is obtained from both the child and the parent. 4. Exclusion Criteria (meeting any one of the following will result in exclusion): Clinically diagnosed severe mental illness or psychiatric disorders. Clinically diagnosed eating disorders (e.g., binge eating disorder). Physical developmental abnormalities or disabilities that prevent normal physical activity.
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AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Depressive Symptoms
Timeframe: Baseline (1 week before the intervention), 1 week after the end of the intervention, and 8 weeks after the end of the intervention.
Anxiety Symptoms
Timeframe: Baseline (1 week before the intervention), 1 week after the end of the intervention, and 8 weeks after the end of the intervention.
Behavior Change Motivation
Timeframe: Baseline (1 week before the intervention), the very end of the intervention, and 8 weeks after the end of the intervention.
Autonomous Motivation
Timeframe: Baseline (1 week before the intervention), 1 week after the end of the intervention, 1 month after the end of the intervention, and 8 weeks after the end of the intervention.
Physical Activity Level
Timeframe: Baseline (1 week before the intervention), 1 week after the end of the intervention, 1 month after the end of the intervention, and 8 weeks after the end of the intervention.
Exercise Self-Efficacy
Timeframe: Baseline (1 week before the intervention), 1 week after the end of the intervention, 1 month after the end of the intervention, and 8 weeks after the end of the intervention.
Stage of Behavior Change
Timeframe: Baseline (1 week before the intervention), 1 month after the end of the intervention, and 8 weeks after the end of the intervention.