PRISMA flow chart illustrating study inclusions through the stages of the systematic review. PRISMA flow chart illustrating study inclusions through the stages of the systematic review. AP, academic performance; CB, classroom behaviour; CF, cognitive function; CMB, classroom movement break; PAL, physically activie learning ; PRISMA, Preferred Reporting Items for Systematic Reviews and Meta-Analyses. Andy J Daly-Smith et al. BMJ Open Sport Exerc Med 2018;4:e000341 ©2018 by BMJ Publishing Group Ltd