简介：

简介：Background:Overweightandobesityhasbecomeaseriouspublichealthprobleminmanypartsoftheworld.Studiessuggestthatmakingsmallchangesindailyactivitylevelssuchas"breaking-up"sedentarytime(i.e.,standing)mayhelpmitigatethehealthrisksofsedentarybehavior.Theaimofthepresentstudywastoexaminetimespentinstanding(determinedbycountthreshold),lying,andsittingpostures(determinedbyinclinometerfunction)viatheActiGraphGT3Xamongsedentaryadultswithdifferingweightstatusbasedonbodymassindex(BMI)categories.Methods:Participantsincluded22sedentaryadults(14men,8women;meanage26.5±4.1years).Allsubjectscompletedtheself-reportInternationalPhysicalActivityQuestionnairetodeterminetimespentsittingovertheprevious7days.Participantswereincludediftheyspentsevenormorehourssittingperday.PosturesweredeterminedwiththeActiGraphGT3Xinclinometerfunction.Participantswereinstructedtoweartheaccelerometerfor7consecutivedays(24haday).BMIwascategorizedas:18.5to<25kg/m2asnormal,25to<30kg/m2asoverweight,and≥30kg/m2asobese.Results:Participantsinthenormalweight(n=10)andoverweight(n=6)groupsspentsignificantlymoretimestanding(afteradjustmentformoderate-to-vigorousintensityphysicalactivityandwear-time)(6.7hand7.3hrespectively)andlesstimesitting(7.1hand6.9hrespectively)thanthoseinobese(n=6)categories(5.5hand8.0hrespectively)afteradjustmentforwear-time(p<0.001).Therewerenosignificantdifferencesinstandingandsittingtimebetweennormalweightandoverweightgroups(p=0.051andp=0.670respectively).Differenceswerenotsignificantamonggroupsforlyingtime(p=0.55).Conclusion:Thisstudydescribedposturalallocationsstanding,lying,andsittingamongnormalweight,overweight,andobesesedentaryadults.Theresultsprovideadditionalevidencefortheuseofincreasingstandingtimeinobesitypreventionstrategies.