背景:在前交叉韧带重建(ACLR)后观察到着陆任务期间,受累肢体的膝关节伸肌力矩(KEM)减少和KEM的不对称性。关于ACLR后着陆期间动力学和运动学参数与KEM的关联的信息有限。这项研究调查了前后压力中心(AP-COP)位置的关联,垂直地面反作用力(VGRF),在ACLR之后的女运动员着陆期间,下肢关节与KEM成角度。
方法:横断面研究。
方法:22名接受ACLR的女运动员在手术后7.9(1.7)个月进行垂直跳伞。我们评估了KEM,AP-COP立场,VGRF,和矢状平面臀部,膝盖,和脚踝角度使用带测力板的三维运动分析系统。
结果:着陆时受累肢体的KEM峰值明显小于未受累肢体(1.43[0.33]N·m/kg/mvs1.84[0.41]Nm/kg/m,P=.001)。受累肢体的VGRF明显小于未受累肢体(11.9[2.3]N/kgvs14.6[3.5]N/kg,P=.005)。KEM的肢体对称指数由VGRF预测(P<.001,R2=.621,β=0.800)。通过受累肢体中的AP-COP位置(P=.015,R2=.227,β=0.513)和未受累肢体中的VGRF预测KEM(P=.018,R2=.213,β=0.500)。在KEM和下肢关节角度之间没有发现显着相关性。
结论:着陆期间AP-COP位置和VGRF与KEM相关。评估VGRF和AP-COP的立场,不是下肢关节的角度,可能有助于在临床环境中了解ACLR后双腿着陆期间的KEM。
BACKGROUND: A reduced knee extensor moment (KEM) in the involved limb and asymmetry in the KEM during landing tasks are observed after anterior cruciate ligament reconstruction (ACLR). There is limited information about the association of kinetic and kinematic parameters with the KEM during landing after ACLR. This study investigated the association of the anterior-posterior center of pressure (AP-COP) position, vertical ground reaction force (VGRF), and lower limb joint angles with the KEM during landing in female athletes following ACLR.
METHODS: Cross-sectional study.
METHODS: Twenty-two female athletes who underwent ACLR performed a drop vertical jump at 7.9 (1.7) months after surgery. We evaluated the KEM, AP-COP position, VGRF, and sagittal plane hip, knee, and ankle angles using a 3-dimensional motion analysis system with force plates.
RESULTS: The peak KEM in the involved limb was significantly smaller than that in the uninvolved limb during landing (1.43 [0.33] N·m/kg/m vs 1.84 [0.41] Nm/kg/m, P = .001). The VGRF in the involved limb was significantly smaller than that in the uninvolved limb (11.9 [2.3] N/kg vs 14.6 [3.5] N/kg, P = .005). The limb symmetry index of the KEM was predicted by that of the VGRF (P < .001, R2 = .621, β = 0.800). The KEM was predicted by the AP-COP position in the involved limb (P = .015, R2 = .227, β = 0.513) and by the VGRF in the uninvolved limb (P = .018, R2 = .213, β = 0.500). No significant correlation was noted between the KEM and the lower limb joint angles.
CONCLUSIONS: The AP-COP position and VGRF were associated with the KEM during landing. Evaluating the VGRF and AP-COP position, not the lower limb joint angles, may contribute to understanding the KEM during double-leg landing after ACLR in the clinical setting.