简介：在华南区夏季赛的赛场上,来自美国马塞诸塞州的MatthewSpriegel有点"鹤立鸡群"。高个子、白皮肤的他总是微笑示人,其优雅的举止无论场内场外都很抢眼。他的中文名字叫"何勇",但他喜欢大家叫他"Matt"。目前,Matt在广东顺德当英语老师已四个月,他懂一点点中文,会说"好球"。"希望能在中国待5年到10年吧,直到我可以说一口流利的中

简介：Purpose:Thepurposeofthisstudywastocomparethecoordinationbetweenthetrunkandthepelvisduringasustainedasymmetricrepetitiveliftingtaskbetweenagroupwithahistoryoflowbackpain(LBP;HBP)andagroupwithnohistoryofLBP(NBP).Methods:Volunteerslifteda11-kgboxfromankleheightinfronttoashelf45°off-centeratwaistheight,andloweredittothestartpositionat12cycles/minfor10min.Liftingsidewasalternatedduringthetrial.Continuousrelativephasewasusedtocalculatecoordinationbetweenthepelvisandtrunkrotationatthebeginning(Min1),middle(Min5),andendofthebout(Min9).Results:Whiletherewerenomaineffectsforgroup,asignificantinteractionbetweentimeandgroupindicatedthat,inthefrontalplane,theNBPgroupcoordinationwasmoreanti-phasetowardtheendofthebout,withnosuchdifferencesfortheHBPgroup.Analysisofsagittal-axial(bendandtwist)coordinationrevealedtheHBPgroupcoordinationwasmorein-phaseattheendoftheboutovertheentirecycleandfortheliftingphasealone,withnosuchdifferencesfortheNBPgroup.Conclusion:DifferencesbetweengroupsdemonstrateresidualconsequencesofLBPinanoccupationalscenario,eventhoughtheHBPgroupwaspain-freefor>6monthspriortodatacollection.Morein-phasecoordinationintheHBPgroupmayrepresentacoordinationpatternanalogousto'guardedgait'whichhasbeenobservedinotherstudies,andmaylendinsightastowhytheseindividualsareatincreasedriskforre-injury.