简介：Higherlevelsofmoderate-to-vigorousphysicalactivity(MVPA),andmaybeevenlightphysicalactivity(LPA),havebeenrelatedtobetterhealth,~1motorskills,~2andcognitive~3outcomesinvirtuallyallageandabilitygroups.Problematically,however,mostpeopleingeneralarenotpronetoenjoyandparticipateinsubstantialamountsofphysicalactivity(PA),~4

简介：Barefootrunninghasbeenaroundformillionsofyears,anditissafetopresumethatformostofthattime,thepracticeoccasionedlittleinterest.Ourancestorsranbarefootbecausetheyhadnoshoes.Whenfootwearwasfirstinventedduringthelast40,000years(nodoubtatdifferenttimesandindifferentplaces),shoeswerebynecessityminimal-essentiallysandalsandmoccasins-designedtoprotectthesoleofthefootbutlackinganyofthesophisticatedfeaturesandmaterialspresentinmodemrunningshoessuchaselevatedcushionedheels,archsupports,andtoesprings.Mostofthesefeatureswereinventedinthe1970s,andtheyquicklybecamemorepopularandsophisticatedasrunningunderwentaworldwideboom.Today,thevastmajorityofrunnersthinkitisnormaltowearcushionedrunningshoes,andwouldneverdreamofrunningwithoutthem.