of tennis elbow university of 网球肘的生物力学课件

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1、BIOMECHANICSOFTENNISELBOWERICAMICHELLEFERNANDESFriday,26March2010INTRODUCTION:Incidence:ConstitutesasizeablepercentageofelbowinjuriesElbowproblemsoccuratleastoncein40%to50%oftennisplayers(George,etal.,2006)INTRODUCTIONTOTHEELBOWJOINTBASICANATOMYCOMMONAREASOFINFLAMMATIONSU

2、PRACONDYLARRIDGE&EPICONDYLFACETSTENDONBODYMUSCULOTENDINOUSJUNCTIONMUSCLEBELLYConceptofsweetspot:FORCESACTINGonthehand:Forces:EQUATIONSOFMOTIONINTENNISF+Fr=MdV/dtFb-Frh=Icmdw/dtFrLf=Ifdwf/dtVp=Lfwf=hw-VContd….Factorsresponsiblefortenniselbow:-PoortechniqueForcedeccentricmus

3、clecontractionElbowCrunchWristCrunchImpulsereactionShockTipspeedElbowcrunchBeforeimpact,Centripetalforce=centrifugalforceAfterimpact,Centripetalforce>centrifugalforceMeasuredinNewton:1N=0.225lbs.Formula:Shock*2/R’.Wristcrunch:Measuredfromcentreofmasstothewrist.Formula:Shoc

4、k*2/R”(R”=distancefromwristtoaxisofrotation+distancefromaxistobalancepoint.Shock:Shock=differencebetweeninitialandfinalkineticenergiesMeasuredinjoulesHighshockisbadbecauseitmeanshighelbowandwristcrunch.Tipspeed:Lowtipspeedisbetterthanahightipspeed.betterracquetcontrolmorea

5、ccurateImpulsereaction:Positiveimpulseisbettersinceitleadstolessimpactforceattheelbowjoint.FactorstobeconsideredtotreatTenniselbowEarlyphaseofrehabilitationR.I.C.EPHASE1Goals:decreaseinflammationandpain,promotetissuehealing,andretardmuscleatrophy.Duringtheacutestageofyouri

6、njury,whetherthemedialorlateralelbowisaffected,followtheRICEprinciple:Stretching:Strengtheningexercises:Phase2:Gripstrengthening,Pronationsupination:Phase3:PHASE3Goals:Improvemuscularstrengthandendurance,maintainandimproveflexibility,andgraduallyreturntopriorlevelofsportor

7、highlevelactivity.15minutesforehandonly30minutesforehandonly30minutesforehandandtwohandedbackhand45minutesforehandandbackhand45minutesallstrokesServeFullplayCompetitiveplayMeasurestoavoidTenniselbow:ERGONOMICSEquipmentmodificationHeadsizeWeightoftheracquetFrameStiffnessStr

8、ingtensionRacquetmaterialGripsizeMoveablemassracquetCorrectplayingstrategiesGripsize:Agri