简介：Background:Childrenspend70%oftheschooldaysittinginclass.Classroom-basedactivebreakscanbenefitchildren’sphysicalhealth,butifthebreaksarecognitivelydemanding(i.e.,combinephysicalexertionandmentalengagement),theymayalsoimprovefocusandcognitivefunctions.Teachersandstudentsplayacrucialroleinthesuccessfulimplementationofactivebreaks,andtheirperspectivesarecriticaltothefeasibilityofthesestrategies.Theaimofthisstudywastoassessthefeasibilityofimplementingacognitivelychallengingmotortaskasanactivebreakinmainstreamandspecialprimaryschools.Methods:Atotalof5teachersin2mainstreamschoolsand7teachersin1specialschool(attendedbychildrenwithneurodevelopmentaldisorders)attendeda20-mintrainingonhowtoimplementa4-mincognitivelychallengingactivebreak,beforeconductingafeasibilitytrial(twiceadayfor1week).Tounderstandindividualperceptions,one-on-onesemistructuredinterviewswereconductedbeforeandafterthetrialwithteachers,andfocusgroupinterviewswereconductedwithtypicallydevelopingchildrenafterthetrial.Questionswerebasedonapredefinedframeworkforfeasibilitystudies.Allinterviewswereaudiorecorded,transcribedandanalyzedinNVivo11usingaframeworkapproach.Atotalof12teachers(11females;7between20and34yearsold)and34children(16girls;9.3±1.7years,mean±SD)participatedintheinterviews.Results:Inmainstreamschools,teachersviewedthecognitivelychallengingmotortaskasappropriateandpotentiallybeneficialforchildren’shealthandfocus.Childrenreportedenjoyingtheactivebreaks.Teachersinspecialschoolsviewedthetaskascomplexandpotentiallyfrustratingforchildren.Inbothschooltypes,children’sdisruptivebehaviorandlackoftimewereseenasthemainpotentialbarrierstoimplementation.Theuseofmusic,videos,visualcards,andsupportstaffwerenotedaspotentialfacilitators.Conclusion:Thecognitivelychallen

简介：Background:Althoughevidenceonthehealtheffectsofsedentarybehavior(SB)hasgrownsystematicallyinrecentyears,fewdevelopingcountrieshavereportedpopulationlevelsofSB,especiallyinSouthAmerica.OurobjectivewastodescribetimespentsittinginarepresentativesamplefromChilecategorizedbyage,gender,educationallevel,andbodymassindex(BMI).Methods:AnationalhealthsurveywasconductedinChileinanationallyrepresentativesample(n=5411)in2009-2010.Sittingtime(ST)wasmeasuredwiththeGlobalPhysicalActivityQuestionnaireVersion2.Results:Datawerefrom5031participants(43.26±0.41years,mean±SE;40.3%male).Overall,therewerenogenderdifferencesinmeanST(men:158.10±5.80min/day,women143.45±4.77min/day;p=0.05).STwaslowerinthosewholivedinruralareascomparedwithurbanareas(99.4min/dayvs.160.0min/day;p=0.001).STincreasedsignificantlywithincreasingBMI,butonlyinmen(p=0.009),andwaspositivelyrelatedtoyearsofeducationinbothmenandwomen(p<0.0001).Conclusion:Thefindingsweredifferentfromthosereportedinothercountriesandcontexts,reinforcingtheneedforinternationalsurveillanceandmonitoringovertimetoinformpolicymakers.DifferencesinSTacrossdifferentgroupsemphasizetheneedtodeveloptailoredmessagesandinterventionsforreducingSTindifferentpopulationsubgroups.