Table 3 Summary of measures among student participants in the Let’s Move It trial

Background information, covariates

X

X

X

 Objectively measured PA & SB (Hookie accelerometry)

X

X

X

 Self-reported PA, SB, and interruptions in SB [38, 42–46]

X

X

X

X

Other health related outcomes/covariates

 Objectively measured body composition (Tanita MC-780 MA)

X

X

 Self-reported health & physical fitness [47]

X

X

X

 Somatic symptoms (e.g. support- and mobility organ symptoms), stress, sleep [47] (e.g. [48–50]), dietary habits [51, 52]

X

X

X

 Smoking

X

X

 Behavioural beliefs: PA outcome expectations, PA descriptive norms (peers & parents), PA injunctive norm (parents), PA intention, PA self-efficacy/perceived behavioural control [53–55]

X

X

X

X

 PA autonomous and controlled motivation [56]; integrated regulation subscale [57]

X

X

X

X

 Opportunities for PA (school, neighborhood, at home)

X

X

X

 PA automaticity [58]

X

X

 PA action and coping planning [59]

X

X

X

 Big five personality traits, brief measure [60]

X

 Behavioural beliefs: SB restriction outcome expectations, descriptive (peers) & injunctive norms (peers, teachers), self-efficacy/perceived behavioural control, intention [53–55]

X

X

X

X

 Automaticity [58]

X

X

 Autonomous and controlled motivation [56]

X

X

 Perceived teacher actions to reduce students’ sitting, Perceived opportunities for SB reduction within school^b

X

X

X

X

 Teacher sitting reduction behavior (in school classes, perceived)^b

X

X

 Teacher motivational behavior for reducing student SB (e.g. discussions on SB at home/work practice)^b

X

X

 Student group climate (acceptance & safety) [61]

X

X

X

X

 PA related BCT use: Frequency-dependent BCTs, Other BCTs ^b

X

X

X

X

 SB related BCT use^b

X

X

 Recalled number of intervention sessions attended^a

X

 Intervention satisfaction^a

X

 Evaluation of intervention provider^a (autonomy support) [62]

X

X

 Evaluation and use of home workout videos, workbook & website^{a b}

X

 Open-ended questions on intervention^{a b}

X

X

 Injuries or illnesses that prevent or limit PA

X

X

X

X

 Perceived harmful effects from the intervention, open-ended^{a b}

X

 Injuries

X