摘要
Purpose:Toobservetherelativechangeinfoot-strikepattern,pressurecharacteristics,surfaceelectromyography(sEMG)recordings,andstridecharacteristicsinforefootstrikerunnerswearingbothminimalistandtraditionalshoesduringa50-kmrun.Methods:Fourexperiencedminimalistrunnerswereenrolledinthisstudy.Eachrunnerrana50-kmsimulatedruninbothminimalistshoesandtraditionalshoes.Pressuredata,sEMGrecordings,andlimited3Dmotioncapturedatawerecollectedduringtheinitial0.8kmandfinal0.8kmforeachtrial.Results:Threerunnersinthetraditionalshoetypeconditionandonerunnerintheminimalistshoetypeconditiondemonstratedamoreposteriorinitialcontactarea(midfootstrike(MFS)pattern)afterthe50-kmrun.whichwassupportedbyincreasedactivityofthetibialisanteriorinthepre-contaetphase(asperrootmeansquare(RMS)values).Inaddition,inbothpre-andpost-runconditions,therewereincreasedpeakpressuresintheminimalistshoetype,specificallyinthemedialforefoot.Musclefatigueasdefinedbyadecreasedmedianfrequencyobservedinisometric,constantforcecontractionsdidnotcorrespondwithourhypothesisinrelationtotheobservedfootstrikechangepattern.Finally,steprateincreasedandsteplengthdecreasedafterthe50-kmruninbothshoetypeconditions.Conclusion:Morerunnersadoptedamoreposteriorinitialcontactareaafterthe50-kmruninthetraditionalshoetypethanintheminimalistshoetype.Therunnerswhoadoptedamoreposteriorinitialcontactareaweremorecloselyassociatedwithanincreasedmedianfrequencyofthemedialgastrocnemius,whichsuggeststheremaybeachangeinmotorunitrecruitmentpatternduringlong-distance,sustainedvelocityrunning.Theincreasedpeakpressuresobservedinthemedialforefootintheminimalistshoetypemaypredisposetometatarsalstressfracturesinthesettingofimpropertraining.
出版日期
2014年02月12日（中国期刊网平台首次上网日期，不代表论文的发表时间）
