EveryhourspentinwatchingTVDVDsandvideosasanadultreduceslifeexpectancybyalmost22minutesastudysuggests.AndviewingTVforanaverageofsixhoursadaycancutshortyourlifebyfiveyears.
Theresearchclaimsthatasedentary(久坐的)lifestyleisasbadforhealthassmokingandobesitybecauseofthedangerscausedbyinactivityandthegreateropportunitiesitoffersforunhealthyeating.
Theacademicsconductingthestudysetouttocalculatetheoverallrisktolifeexpectancyfromwatchingtelevision.Theirresearchinvolvedmorethan11000peopleovertheageof25.
WritingintheBritishJournalofSportsMedicinetheyconcluded."TVviewingtimemaybeassociatedwithalossoflifewhichissimilartoothermajorchronicdiseaseriskfactorssuchasphysicalinactivityandobesity."
TheresearchersfromtheUniversityofQueenslandusedinformationfromtheAustralianDiabetesObesityandLifestyleStudytogetherwithpopulationanddeathratedata.
Buttheysaid:"AlthoughweusedAustraliandatatheeffectsinotherindustrializedanddevelopingcountriesarelikelytobesimilarconsideringthelargeamountsoftimespentwatchingTVandsimilaritiesindiseasepatterns."IntheUnitedKingdomtheaverageamountoftimespentwatchingTVisfourhoursadaycomparedwithfivehoursintheUnitedStates.
Earlierthisyearaseparatestudysuggestedtheriskofdevelopingtype2diabetesandheartdiseaseordyingearlyrisesbyasmuchas20percentafterjusttwohoursadayinfrontofthebox.
England'sChiefMedicalOfficerSallyDaviessaid:"Physicalactivityoffershugebenefitsandthesestudiesbackwhatwealreadyknow-thatasedentarylifestylecarriesadditionalrisks.Wehopethesestudieswillhelpmorepeoplerealizethattherearemanywaystogetexercise."
1.Wecanlearnfromthepassagethat_______
A.whetheryouwatchTVornothasnothingtodowithhowlongyouwilllive
B.ifanadultwatchesTVforsixhourseverydayhewilldiefiveyearsearlier
C.physicalinactivityandobesitywon'tshortenyourlife
D.asedentarylifestyleoffershugebenefits.
2.Theword"it"inthesecondparagraphrefersto
A.asedentarylifestyle
B.