Table 1.

Databases searched, keywords by category, and keyword combinations used for the review

Databases	Keyword category 1: action	Keyword category 2: strategy	Keyword category 3: participants
PubMed	Physical activity	int*	Child*
Google Scholar	Exercise	Trial	Youth
ERIC	Movement	Program*	Student*
PsycINFO		Training	Class*
			Elementary
			Primary
			School

Keyword combinations used for the review

exercise AND int* AND class*

physical activity AND trial AND class*

movement AND program* AND class*

exercise AND int* AND school

physical activity AND trial AND school

movement AND program* AND school

exercise AND int* AND school

physical activity AND trial AND elementary

movement AND program* AND elementary

physical activity AND class* AND child*

physical activity AND child* AND school*