不同坐姿下腰部负荷及竖脊肌活动的生物力学研究Ξ

©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(2008)0120067206:A:G804163Xa,b,a,a(a.,b.,710068):(sEMG),10(21.40.69,172.92.72cm,62.94.95kg),()10:,,;,,;,,,:;;;TheBiomechanicalStudyontheWaistLoadandtheActivitiesinErectorSpinaeunderDifferentSittingPostureWANGkun,BAIAi2li,LIXiao2sheng,JIANGTao(XianPhysicalEducationUniversity,Xian710068,China)Abstract:Tenmalesubjects(ages:21.40.69y,heights:172.92.72cm,weights:62.94.95kg)areresearchedinthebiomechanicsexperimentation(includeimageanalysisandmeasureofforceandsEMG)andanthropometryandstatisticsmeasure2menttoanalyzeandaccountthewaistload(musclemoment),andattaintheloadofthe4sittingpostureandthesEMGofthe10sit2tingposture,linkingtostaticdynamicstheoryandthebodybasicparameterofZhengXiuyuan.Theresultshows:underthedifferentsittingposture,thealterationofthebodyposturehasgreatinfection,thewaistloadisbiggerthanstaging;theidenticallumbarsec2tionthemusclemomentisabiggerdifferencebecauseofthesittingposturechange,inwhichrelaxingposturebebiggerthanthestiffposture,postureonthedeskisbiggerthanwithoutthestrutposture;thechangeofsEMGisdifferentunderdifferentposture,itsac2tiveintensitychangemainlydecidedbythespinalcolumnpitchdegree.Therefore,ifwewanttoreducetheloadofthewaistbackmuscleandpreventthemuscledisease,thespinalcolumnpitchangleisreducedasfaraspossible.Keywords:seatposture;musclemoment;waistload;sEMG.,,,,,,,,,[1-4],,[5-6],(),,(),,11.12004(),10,21.40.69,172.92.72cm,62.94.95kg1.21.2.11121111,7625120081JOURNALOFXIANPHYSICALEDUCATIONUNIVERSITYVol125No11Jan12008X:2007208224;:2007209226:(0605):(19632),,,,,,;(19842),,,;(19802),,,,©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(S1)(S2),:3(S3)3(S4)3(S5)3(S6)3(S7)3(S8)3(S9)3(S10)3(S11)3(S12)1121112:,(1)S1S2S3S4S5S6(1)1Fig.1MeasurementPosture:,S1S2S3S4S5S6S7S8S9S10S11S1212,[8],165-179cm,:730mm,420mm,600mm100mm,730mm,420mm1121113,S1S2S3S4S5S6,S5S6(Kistler9287B)100Hz,900mm600mm100mm(SonyDCR-48E)5m,1.1m22cm,,21.54cm,ME6000S1S2S3S4S5S6S7S8S9S10S11S121-24-515sME6000sEMG,Ag-AgClL1-L2L4-L5,0.5cm,2cm,,(2)1000HzsEMGASCII2Fig.2EMGMeasurement1.2.2,,:(1)(2)86125©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(3)3Fig.3TrunkModelingandCalculation1.2.3(1):,,,:V=h6(2AB+aB+Ab+2ab),,ABab[9]0.938,1.002,:m1=0.9383h6(2AB+aB+Ab+2ab)m2=1.0023h6(2AB+aB+Ab+2ab):m=m1+m2,(),S1S2S3S4S5S65(),M=MPi45(2):(IEMG)(RMS)1.2.4Spss10.0(),P0.05,P0.0122.1,4,,,,,,4S3S4Fig.4StressFigureatPostureS3andS45S5S6Fig.5StressfigureatPostureS5andS6,,;,2.1.11S3-S6(1),,S3S6123(P0.05),(P0.01)2-2.4,3.2-3.9625,:1©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(:kgm)Tab.1WeightMomentunderDifferentPostures(Unit:kgm)12345S11.920.521.880.531.940.562.060.642.260.74S21.130.541.170.611.260.641.500.651.760.67S33.931.014.111.014.120.994.160.964.070.88S42.290.522.470.572.590.542.750.562.980.66S56.491.136.821.167.081.227.271.227.431.28S65.381.055.721.126.021.176.271.176.661.242.1.2,,,,,,,,,2,S5S645,(P0.05)1.8-2.2,7.5-8.9;1.7-2.2,8.4-9.9;1.3-1.7,,,:,,,,,,,,,,,,,;,,,,,,1515,,15,,07125©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(:kgm)Tab.2MusclesMomentunderDifferentPostures(Unit:kgm)12345S11.920.521.880.531.940.562.060.642.260.74S21.130.541.170.611.260.641.500.651.760.67S33.931.014.111.014.120.994.160.964.070.88S42.290.522.470.572.590.542.750.562.980.66S5-16.212.37-16.722.73-16.922.91-16.953.10-17.053.40S6-9.914.57-11.454.50-11.965.24-13.106.96-14.829.63,,,,,,,,S5S6,2.26(3),,,,IEMGRMS(P0.05);IEMGRMS(P0.05)3Tab.3EMGIndexesunderDifferentPosturesIEMGRMSS30.430.206.042.54S40.760.499.254.10S50.680.397.482.75S60.890.5311.407.90S70.420.165.872.07S80.610.397.974.51S90.940.7911.678.38S101.230.6915.229.73S110.470.195.191.21S120.550.338.175.44:1-2Notes:IndexesofleftErectorSpinaeofL1-26Fig.6RawEMGunderDifferentPostures:1-2Notes:rawEMGofleftErectorSpinaeofL1-2.,,,IEMGRMS,,,;,,,IEMGRMS,,,,1725,:1©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(1)()1.8-8.9:,(2),,,5,(3),,,,,,,(4),,;,();,:[1]AhmedAM,DuncanBA,BurkfDL.Theeffectoffacetge2ometryontheaxialtorque2rotationresponseoflumbarmotionsegments[J].Spine,1990,(15):3912401.[2]PanjabiMM,OxlandT,TakataK,etal.Articularfacetsofthehumanspine:Quantitativethree2dimensionalanatomy[J].Spine,1993,(18):129821310.[3]VanSchaikJPJ,VanPinxteenB,VerbiestH,etal.Thefacetorientationcircle:Anewparameterforfacetjointangula2tioninthelowerlumberspace[J].Spine,1997,(22):5312536.[4]SharmaM,LangranaNA,PodrigueSJ,Roleofligmentsandfacetsinlumbarspinalstability[J].Spine,1995,(20):8872900.[5],.[J].,2001,22(4):3392341.[6],,.[J].,1998,13(4):2482252.[7],.[M].:,2005:1132134.[8]GB/T3976-2002,:[S].[9].[M].:,2002:1402144.(45),-,,,,--,,,,3,,,,,,,,,,,:[1]1[R].2001.[2]1[J].,2000,(5):25227.[3],.[M].:,1999.27125