This unique project will help to elucidate the mechanisms via which exercise and mental health are related in children with neurodevelopmental conditions. Parents of children with neurodevelopmental conditions will be consulted during the initial stages of study development and during the dissemination of the findings. By understanding how exercise and mental health are related in children with neurodevelopmental conditions we hope to be in a position to inform the development of educational programmes and parenting strategies designed to optimise exercise in ways that are bespoke to specific challenges. Findings will be shared with policy makers and practitioners through targeted policy briefs, a workshop, and press releases news articles aimed at the general public.