Protocol for a randomized controlled trial of a mobile app and wearable–based intervention promoted through physical education to enhance physical and psychological health in adolescents during out-of-school hours

This study protocol has been reviewed and approved by the Catholic University of Murcia (code: CE022102). It is registered at ClinicalTrials.gov (ID: NCT06140225. Registration date: 11/14/2023). All participants will provide written informed consent before enrollment. The study will be conducted in accordance with the principles of the Declaration of Helsinki. Data may be made available upon reasonable request, in accordance with ethical and legal guidelines.