A. Researchholdsthekeytosuccess

B. Researchonindividualstylesimprovesperformance

C. WhatdoestheOlympicMottoMean?

D. Newequipmenthasmadeadifference

AB．Futurepersonalizedprogramsmightbeofhelptoathletes

AC．Istherealimittorecord-breaking?

48．__________________.

Aworldrecordiseveryathlete’sdreambutthehard-wonrecordsofafewyearsagoaremostlyjusttoday’squalifyingtimes.RogerBannister’sfamousfour-minutemileof1956hasbeenbeatenbynearly15secondswhilealmostanhourandtwentyminuteshasbeentakenoffthewomen’smarathonsince1953“Fasterhigherstronger”istheOlympicmottoandtoday’scompetitorscontinuetopushbacktheboundariesofwhatthebodycanachieve.Butonewondersifthiscancontinue.

49．__________________.

Thelastfortyyearshaveseenmanyimportanttechnologicaladvances.Forexamplesincetheintroductionofstrongflexiblefiberglasspolesoverameterhasbeenaddedtothepolevaultrecord.Therehavealsobeenimportantdevelopmentsinthedesignoftherunningshoes.Andwhileashoewon’tactuallymakesomeonerunfastermodernshoesdomeanmanymoremilesofcomfortableinjury-freetraining.

50．__________________.

Pushingbackthelimitsnowdependsmoreonsciencetechnologyandmedicinethananythingelse.Athletictechniquetrainingprogramsanddietsareallbeingstudiedtofindwaysoftakingafewmoresecondsofforaddingafewmorecentimeterstothatelusiverecord.Itseemsthatnaturalabilityandhardworkarenolongerenough.

51．__________________.

Thesearchtofindmoreefficientwayofmovinggoeson.Analysisofanathlete’sstyleisparticularlyusefulforeventslikejumpingandthrowing.Studiesshowthatlongjumpersneedtoconcentratenotonthespeedofapproachasoncethoughtbutontheangletheirbodiesmakewiththegroundastheytakeoff.Howevertherulesgoverningeachsportlimitadvancesachievedbynewstyles.Forinstanceonlyone-footedtake-offsareallowedinthehighjump.

52．__________________.

Inthefutureitshouldbepossibletodevelopamoreindividualapproachtotrainingprogr