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1、MoreThan8HoursSleepTooMuchofaGoodThing 1 Althoughthedangersoftoolittlesleeparewidelyknown,newresearchsuggeststhatpeoplewhosleeptoomuchmayalsosuffertheconsequences. 2 InvestigatorsattheUniversityofCaliforniainSanDiegofoundthatpeoplewhoclockup19or10hour
2、seachweeknightappeartohavemoretroublefallingandstayingasleep,aswellasanumberofothersleepproblems,thanpeoplewhosleep8hoursanight Peoplewhosleptonly7hourseachnightalsosaidtheyhadmoretroublefallingasleepandfeelingrefreshedafteranight’ssleepthan8-hoursleepe
3、rs.2 3 Thesefindings,whichDr DanielKripkereportedinthejournalPsychosomaticMedicine3,demonstratethatpeoplewhowanttogetagoodnight’srestmaynotneedtosetaside4morethan8hoursanight Headdedthat“itmightbeagoodidea”forpeoplewhosleepmorethan8hourseachnighttocons
4、iderreducingtheamountoftimetheyspendinbed,butcautionedthatmoreresearchisneededtoconfirmthis. 4 Previousstudieshaveshownthepotentialdangersofchronicshortagesofsleep—forinstance,onereportdemonstratedthatpeoplewhohabituallysleeplessthan7hourseachnighthave
5、ahigherriskofdyingwithinafixedperiodthanpeoplewhosleepmore. 5 Forthecurrentreport,Kripkereviewedtheresponsesof1,004adultstosleepquestionnaires,inwhichparticipantsindicatedhowmuchtheysleptduringtheweekandwhethertheyexperiencedanysleepproblems Sleepprobl
6、emsincludedwakinginthemiddleofthenight,arisingearlyinthemorningandbeingunabletofallbacktosleep,andhavingfatigueinterferewithday-to-dayfunctioning5. 6 Kripkefoundthatpeoplewhosleptbetween9and10hourseachnightweremorelikelytoreportexperiencingeachsleeppro
7、blemthanpeoplewhoslept8hours Inaninterview,Kripkenotedthatlongsleepersmaystruggletogetrestatnightsimplybecausetheyspendtoomuchtimeinbed Asevidence,headdedthatonewaytohelpinsomniaistospendlesstimeinbed “Itstandstoreason6thatifapersonspendstoolongatimeinb
8、ed,thenthey’llspendahigherpercentageoftimeawake,”hesaid. 练习： 1.Paragraph2________ 2.Paragraph4________ 3.Paragraph5________ 4.Paragraph6________ A Kripke’sResearchTool B DangersofHabitualShortagesofSleep C CriticismonKr
