目的探究新兵足弓指数与足踝肌肉力量及军事训练伤的关系。方法选取驻闽某部队新兵518名,采用足底压力步态评估系统的足印法计算足弓指数,并使用表面肌电图(sEMG)测量足踝肌肉的均方根(RMS)值。根据足弓指数将受试者分为低足弓组、正常...目的探究新兵足弓指数与足踝肌肉力量及军事训练伤的关系。方法选取驻闽某部队新兵518名,采用足底压力步态评估系统的足印法计算足弓指数,并使用表面肌电图(sEMG)测量足踝肌肉的均方根(RMS)值。根据足弓指数将受试者分为低足弓组、正常足弓组和高足弓组,比较三组不同足弓高度受试者的一般资料,并比较三组受试者足踝训练伤发生率、足踝肌肉力量。另将新兵入伍训练期间出现足踝训练伤的受试者及未出现足踝训练伤的受试者分为训练伤组和对照组,比较两组受试者在一般资料、足弓指数和足踝肌肉力量的差异性,同时采用Spearman秩相关分析足弓指数与足踝肌肉力量、军事训练伤的相关性。结果低足弓组(n=131)、正常足弓组(n=207)、高足弓组(n=180)的一般资料(年龄、身高、体重及BMI)差异无统计学意义(P>0.05);高足弓组的胫前肌RMS(302.28±81.64 vs 336.77±83.19,302.28±81.64 vs325.52±83.30)、腓肠肌RMS(120.83±37.21 vs 133.62±37.81,120.83±37.21 vs 132.12±37.55)、腓骨长肌RMS(178.78±52.92 vs 197.61±50.82,178.78±52.92 vs 192.41±51.09)较正常足弓和低足弓组更低,足踝训练伤发生率较正常足弓和低足弓组(23.89%vs 13.53%,23.89%vs 15.27%)更高(P<0.05)。此外,训练伤组(n=91)和对照组(n=427)的一般资料差异无统计学意义(P>0.05),但是训练伤组的足弓指数(22.51±5.88 vs 23.83±5.48)及足踝肌肉RMS(304.12±84.81 vs 325.74±83.29,121.09±36.18 vs 130.44±38.12,177.83±52.00 vs 192.29±51.93)均较对照组低(P<0.05)。Spearman秩相关分析显示,足弓指数与足踝肌肉(胫前肌、腓肠肌、腓骨长肌)RMS(r=0.171、r=0.116、r=0.114)、足踝训练伤发生率(r=-0.093)存在相关性(P<0.05)。结论低足弓和正常足弓新兵拥有比高足弓新兵更高的足踝肌肉力量,且训练伤发生率更低。新兵足弓指数与足踝肌肉力量、足踝训练伤存在相关性。展开更多
Transverse joint aperture is of certain reference value to ensure joint grouting quality and overall safety of high arch dam. A 3D isoparametric joint element model with spherical surface key grooves and finite thickn...Transverse joint aperture is of certain reference value to ensure joint grouting quality and overall safety of high arch dam. A 3D isoparametric joint element model with spherical surface key grooves and finite thickness is used to simulate a transverse joint. A set of program is developed to simulate the transverse joint ap- erture of Dagangshan high arch dam. Combined with the measured temperatures, the whole developing process of Dagangshan arch dam＇s transverse joint aperture is simulated. The real work behav- ior of transverse joint, thermal and mechanical properties of con- crete, pouring process, joint grouting temperature and cantilever height of high arch dam are considered during the simulation. The simulation results show that the lower of the joint grouting tem- perature, the larger value of transverse joint aperture; the higher of cantilever height during the construction period, the smaller value of transverse joint aperture.展开更多
文摘目的探究新兵足弓指数与足踝肌肉力量及军事训练伤的关系。方法选取驻闽某部队新兵518名,采用足底压力步态评估系统的足印法计算足弓指数,并使用表面肌电图(sEMG)测量足踝肌肉的均方根(RMS)值。根据足弓指数将受试者分为低足弓组、正常足弓组和高足弓组,比较三组不同足弓高度受试者的一般资料,并比较三组受试者足踝训练伤发生率、足踝肌肉力量。另将新兵入伍训练期间出现足踝训练伤的受试者及未出现足踝训练伤的受试者分为训练伤组和对照组,比较两组受试者在一般资料、足弓指数和足踝肌肉力量的差异性,同时采用Spearman秩相关分析足弓指数与足踝肌肉力量、军事训练伤的相关性。结果低足弓组(n=131)、正常足弓组(n=207)、高足弓组(n=180)的一般资料(年龄、身高、体重及BMI)差异无统计学意义(P>0.05);高足弓组的胫前肌RMS(302.28±81.64 vs 336.77±83.19,302.28±81.64 vs325.52±83.30)、腓肠肌RMS(120.83±37.21 vs 133.62±37.81,120.83±37.21 vs 132.12±37.55)、腓骨长肌RMS(178.78±52.92 vs 197.61±50.82,178.78±52.92 vs 192.41±51.09)较正常足弓和低足弓组更低,足踝训练伤发生率较正常足弓和低足弓组(23.89%vs 13.53%,23.89%vs 15.27%)更高(P<0.05)。此外,训练伤组(n=91)和对照组(n=427)的一般资料差异无统计学意义(P>0.05),但是训练伤组的足弓指数(22.51±5.88 vs 23.83±5.48)及足踝肌肉RMS(304.12±84.81 vs 325.74±83.29,121.09±36.18 vs 130.44±38.12,177.83±52.00 vs 192.29±51.93)均较对照组低(P<0.05)。Spearman秩相关分析显示,足弓指数与足踝肌肉(胫前肌、腓肠肌、腓骨长肌)RMS(r=0.171、r=0.116、r=0.114)、足踝训练伤发生率(r=-0.093)存在相关性(P<0.05)。结论低足弓和正常足弓新兵拥有比高足弓新兵更高的足踝肌肉力量,且训练伤发生率更低。新兵足弓指数与足踝肌肉力量、足踝训练伤存在相关性。
基金Supported by the National Natural Science Foundation of China(50909078)the National Basic Research Program of China(973 Program)(2013CB035901)
文摘Transverse joint aperture is of certain reference value to ensure joint grouting quality and overall safety of high arch dam. A 3D isoparametric joint element model with spherical surface key grooves and finite thickness is used to simulate a transverse joint. A set of program is developed to simulate the transverse joint ap- erture of Dagangshan high arch dam. Combined with the measured temperatures, the whole developing process of Dagangshan arch dam＇s transverse joint aperture is simulated. The real work behav- ior of transverse joint, thermal and mechanical properties of con- crete, pouring process, joint grouting temperature and cantilever height of high arch dam are considered during the simulation. The simulation results show that the lower of the joint grouting tem- perature, the larger value of transverse joint aperture; the higher of cantilever height during the construction period, the smaller value of transverse joint aperture.
