Research on the Needs, Feasibility, and Intervention Effects of AI Health Coach-based Just-in-Time Adaptive Intervention (JITAI) in Weight Management for Overweight/Obese Adults

Inclusion Criteria

Inclusion Criteria: * Aged 18 to 60 years. * Body mass index of 24 kg/m2 or higher, meeting the Chinese criteria for overweight or obesity. * Able to use a smartphone, WeChat-based platform, and wearable device during the study period. * Willing to participate in the AI health coach-based just-in-time adaptive intervention and complete study assessments. * Provided written informed consent. Exclusion Criteria: * Pregnancy, lactation, or planning pregnancy during the study period. * Severe cardiovascular, cerebrovascular, hepatic, renal, endocrine, psychiatric, or other major diseases that may affect study participation or safety. * Medical conditions or medications that may substantially affect body weight or body composition. * Contraindications to physical activity or inability to complete the intervention procedures. * Current participation in another weight-management intervention or clinical study. * Inability to understand the study procedures or complete the required assessments.