Abstract:

Objective To systematically analyze the policies on children's physical activity, sedentary behavior, obesity prevention and control, and functional and mental health issued by international organizations and China; as well as the health behavior intervention models targeting physical activity and psycho-behavioral health for overweight or obese children from the functional perspective of International Classification of Functioning, Disability and Health (ICF).

Methods A total of six international policy documents and three national policies were included. Three health behavior intervention models, namely Behavioral Susceptibility Theory (BST), Family-based Behavioral Treatment (FBBT) and Healthy Lifestyles Programme (HeLP), were discussed focusing on the opportunity, motivation, and function and capability.

Results International policies formed a closed loop in four domains: strategy, technology, governance and monitoring. The United Nations Children's Fund also emphasized the importance of psychosocial and equity dimensions. China's relevant policies attached great importance to the monitoring and implementation of children's physical activity, as well as issues such as physical activity and mental health stressing the personalized needs of obese children and the integration of physical activity with health-related psycho-behavioral interventions. BST set up fun moderate-to-vigorous physical exercises and parent-child emotional eating education before meals, mainly targeting children susceptible to high food responsiveness, to regulate energy balance and strengthen motivation. FBBT reshaped family environmental opportunities through behavioral control, family contracts and parental modeling, to enhance children's self-efficacy and physical activity. HeLP integrated drama therapy and peer support into classroom and extracurricular activities, to create a positive atmosphere to enhance a sense of belonging and sustained participation. These intervention models improved functional and psycho-behavioral health through environmental empowerment and motivation activation.

Conclusion The global policy framework has expanded from controlling body mass index to multi-dimensional health goals of improving function and psycho-behavioral health. Current international and national policies have covered the four key dimensions of strategic goals, behavioral guidelines, governance measures and monitoring indicators. The physical activity-related health behavior intervention models, such as BST, FBBT and HeLP, may increase the physical activity level of obese children and promote psycho-behavioral health by expanding environmental opportunities, enhancing psychological motivation and improving physical function and capability.

Key words: overweight, obesity, children, physical activity, function, psycho-behavioral health, International Classification of Functioning, Disability and Health, health behavior intervention