简介:Giventherisingtrendinobesityinchildrenandyouthandage-relateddeclineinmoderate-to-vigorous-intensityphysicalactivity(MVPA)inseveralWestern,African,andAsian-Pacificcountries~1andstrongevidencethatpastphysicalactivity(PA)interventionshavehadonlyasmalleffectonchildren’sandyouth’soverallactivitylevels,~2itisimportanttoclarifywhetherschool-basedPAinterventionswarrantresourceallocation.Schoolsrepresentanaccessibleandcost-effectivesetting