Shadyabandhisresearchteambelievetheyarethefirsttoobjectively measurehowthecombinationofsedentarytimeandexercisecaninfluencethe agingbiomarker.

Nearly1,5000women,ages64to95,participatedinthestudy.The participantscompletedquestionnairesandworeanaccelerometerontheirright hipforsevenconsecutivedaysduringwakingandsleepinghourstotracktheir movements.

“Wefoundthatwomenwhosatlongerdidnothaveshortertelomerelengthif theyexercisedforatleast30minutesaday,thenationalrecommended guideline,”saidShadyab.“Discussionsaboutthebenefitsofexerciseshould startwhenweareyoung,andphysicalactivityshouldcontinuetobepartofour dailylivesaswegetolder,evenat80yearsold.”

Shadyabsaidfuturestudieswillexaminehowexerciserelatestotelomere lengthinyoungerpopulationsandinmen.

28.Theunderlinedword“sedentary”inthe1stparagraphmostprobably means________

AasleepBelderlyCseatedDactive

29.Thestudymainlyfoundrecentlythat

A.toomuchsittingbuttoolittleexercisemayquickenbiological aging