Just-in-time adaptive intervention in physical activity promotion:a scoping review
Objective To conduct a scoping review to explore the application of Just-in-time adaptive intervention(JITAI)in physical activity promotion,and to provide reference for future research and clinical application.Methods Based on the scoping review frame-work proposed by Arksey and O'Malley,relevant literature regarding JITAI in physical activity promotion was searched in Eng-lish-language and Chinese-language bibliographic databases from inception of each database to June 20,2024.The included litera-ture was summarized and analyzed.Results A total of 22 publications were included.JITAI was mainly conducted via smartphone and Apps.JITAI targeted students,occupational populations,older adults,overweight/obese people and patients with chronic di-seases.Theories for guiding the construction of JITAI were the Theory of Behavior Change and the Fogg Behavior Model.The in-tervention design framework included long-term outcome,short-term outcome,decision points,intervention options,tailoring variables and decision rules.The outcome indicators included eight aspects:sedentary time,activity level,walking distance,psy-chological/emotional state,quality of life,physiological parameters,feasibility and acceptability.Conclusion JITAI has the advan-tages of ecological validity,adapted and system-triggered support,and fun in increasing physical activity.In the future,it is neces-sary to conduct large-sample,high-quality randomized controlled studies,pay attention to the characteristics and needs of the rep-resentative populations,improve protocol design,optimize decision rules,consider the feasibility and acceptability of intervention delivery,thus to enhance the impact of JITAI in physical activity promotion.