Table 1.

Components of the Stand Out in Class intervention

Intervention component	Target domain	Meditating variable	Description
Adjustable sit-stand desks	Environment	Exposure to desks	Six adjustable sit-stand desks introduced into the classroom
Nudging prompts	Environment	Children choose to stand rather than sit when using desks	Stickers placed upon each of the sit-stand desks • Have you stood up this lesson? • Standing tall and proud this lesson?
2-h one-to-one meeting	Teacher	Exposure to desks	2-h meeting with teacher which will cover: - Why it is important to increase standing/reduce sitting - Importance of exposure to sit-stand desks - Safety—how to use the desks - Rotation plan and example, plus creation of a rotation plan for the following 2 weeks
Professional Development Manual	Teacher	Exposure to desks	Cover topics such as - Why it is important to increase standing/reduce sitting - Importance of exposure to sit-stand desks - Safety—how to use the desks - Rotation plan example
Planned weekly rotation plan	Teacher	Exposure to desks	Teacher creates a predetermined rotation plan and keeps a record of whether this was met or not—simple tick sheet
Fortnightly support with practitioners	Teacher	Exposure to desks	Phone or face-to-face meeting with researchers/practitioners—discuss any issues around implementation of rotation plans.
30-min workshop	Children	Exposure to desks Children choose to stand rather than sit when using desks	Cover topics such as - Why it is important to increase standing/reduce sitting - Importance of exposure to sit-stand desks - Safety—how to use the desks - Rotation plan and how it will work - Discuss other intervention aspects—social contract and competition
Standing champion/leader	Children	Exposure to desks Children choose to stand rather than sit when using desks	One child in a group is chosen as a standing champion with responsibility of reminding the teacher of the rotation plan.
Group contract	Children	Exposure to desks Children choose to stand rather than sit when using desks	Children are all asked to sign a large contract which will state: I will try my best to - Stand up in a good posture when using the sit-stand desk. - Not to disturb the class when I stand up at my sit-stand desk. - Remember when it is my turn to use the sit-stand desk. - Be very careful not to hurt myself or other people when I use the sit-stand desk.