Table 1.

Action 3:30 intervention components

Component	Description
25-hour TA training programme	Community Sports Leader Award (tailored for teaching assistants)
	FUNdamentals (Bristol City Council in-house training programme that focuses on fundamental movement skills)
	Focused sessions on learning about motivation and delivery to pupils in an autonomy-supportive manner
First-aid certificate course	One-day first-aid training course
Ongoing TA support	One-day ‘booster’ training session for TAs, to occur after the first 10 weeks of the intervention
	One visit per school by trainer to support TAs during the delivery of the sessions
	Three hours of phone or email support per school from trainer
Session plans	40 one-hour session plans
Action 3:30 clubs	Trained TAs run a 1-hour Action 3:30 session at the school site twice a week for 20 weeks
	TAs deliver content on Action 3:30 session plans
Parental information sheets	Biweekly (every four sessions); outlines activities that have been taught during the previous two weeks
	Children and parents provided with ideas of activities that the children could engage with parents, siblings or friends to reinforce activity session materials

TA, teaching assistant.