Demetriou 2019.

Study name	CReActivity
Methods	Type of trial: effectiveness Allocation: cluster‐randomised Intervention model: parallel assignment Masking: open
Participants	Estimated number of schools: ‐ Estimated number of students: 600 Inclusion criteria (schools): ‐ Exclusion criteria (schools): ‐ Inclusion criteria (students): female, ages 10 to 14 years, secondary school in the region of München Exclusion criteria (students): none
Interventions	Intervention: theory‐based intervention implemented within PE classes, focused on behaviour change techniques Comparator: regular PE
Outcomes	Primary outcomes: total PA and PA during PE Secondary outcomes: autonomy, competence, relatedness, self‐efficacy, social support, behavioural regulation, BMI Other outcomes: environmental factors, teacher characteristics, process evaluation
Starting date	Trial start date: 18/10/01 Trial completion date: ‐
Contact information	Responsible party/principal investigator: Ms. Prof. Dr. Yolanda Demetriou; yolanda.demetriou at tum.de
Notes