Fidelity
To assess intervention fidelity, we undertook direct observation by trained research assistants, using a standardized checklist at Weeks 4 and 10 of the 12-week intervention. Components of the classroom sessions (e.g., attendance, correct slides, weight check, and delivery) and the physical activity sessions (e.g., individualized exercises, adherence to SAAFE principles, and general delivery) were assessed on whether they were delivered or not; the research team provided verbal and written feedback to the trainers to address any gaps in intervention delivery. All coaches passed these checks.