health wearable, pedometer, self-monitoring, intervention fidelity, process evaluation

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Health wearable technologies have become popular in recent decades to improve individual physical activity (PA) behavior. Thus, this paper aims to examine the health of wearable-based PA intervention among children and adolescents and provide narrative overviews. This paper retrieved articles based on the following inclusion criteria: (1) experimental design; (2) studies among healthy children and adolescents aged from 5 to 18 years; (3) studies using health wearables as a medium to enhance PA or reduce sedentary behavior; and (4) studies with PA assessments as an outcome. Relevant articles were searched based on recent preceding review papers published in 2021 and 2022. A total of 45 studies were included in this review. Research conducted in the United States was predominant, and the participants' ages varied from 6 to 18 years old. Most interventions were implemented for 6 to 12 weeks, and pedometers seemed to be the most easily accessible device. Regarding intervention fidelity, a brief survey and interview were the most frequently used methods. However, there is a paucity of research reporting intervention fidelity on this topic, leading to uncertainty about research findings.