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1、MoreThan8HoursSleepTooMuchofaGoodThing 1 Althoughthedangersoftoolittlesleeparewidelyknown,newresearchsuggeststhatpeoplewhosleeptoomuchmayalsosuffertheconsequences. 2 InvestigatorsattheUniversityofCaliforniainSanDiegofoundthatpeoplewhoclockup19or10hourseachwe
2、eknightappeartohavemoretroublefallingandstayingasleep,aswellasanumberofothersleepproblems,thanpeoplewhosleep8hoursanight Peoplewhosleptonly7hourseachnightalsosaidtheyhadmoretroublefallingasleepandfeelingrefreshedafteranight’ssleepthan8-hoursleepers.2 3 Thesef
3、indings,whichDr DanielKripkereportedinthejournalPsychosomaticMedicine3,demonstratethatpeoplewhowanttogetagoodnight’srestmaynotneedtosetaside4morethan8hoursanight Headdedthat“itmightbeagoodidea”forpeoplewhosleepmorethan8hourseachnighttoconsiderreducingtheamount
4、oftimetheyspendinbed,butcautionedthatmoreresearchisneededtoconfirmthis. 4 Previousstudieshaveshownthepotentialdangersofchronicshortagesofsleep—forinstance,onereportdemonstratedthatpeoplewhohabituallysleeplessthan7hourseachnighthaveahigherriskofdyingwithinafix
5、edperiodthanpeoplewhosleepmore. 5 Forthecurrentreport,Kripkereviewedtheresponsesof1,004adultstosleepquestionnaires,inwhichparticipantsindicatedhowmuchtheysleptduringtheweekandwhethertheyexperiencedanysleepproblems Sleepproblemsincludedwakinginthemiddleoftheni
6、ght,arisingearlyinthemorningandbeingunabletofallbacktosleep,andhavingfatigueinterferewithday-to-dayfunctioning5. 6 Kripkefoundthatpeoplewhosleptbetween9and10hourseachnightweremorelikelytoreportexperiencingeachsleepproblemthanpeoplewhoslept8hours Inaninterview
7、,Kripkenotedthatlongsleepersmaystruggletogetrestatnightsimplybecausetheyspendtoomuchtimeinbed Asevidence,headdedthatonewaytohelpinsomniaistospendlesstimeinbed “Itstandstoreason6thatifapersonspendstoolongatimeinbed,thenthey’llspendahigherpercentageoftimeawake,”
8、hesaid. 练习: 1.Paragraph2________ 2.Paragraph4________ 3.Paragraph5________ 4.Paragraph6________ A Kripke’sResearchTool B DangersofHabitualShortagesofSleep C CriticismonKr