Impact of different bilateral knee extension strengths on lower extremity performance.
Impact of different bilateral knee extension strengths on lower extremity performance.
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不同双侧膝关节伸展力量对下肢表现的影响
DOI：
10.1097/md.0000000000027297
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发表时间：
2021-09-24
期刊：
影响因子：
1.6
通讯作者：
Shimizu J
中科院分区：
文献类型：
--
作者：
Cho K;Suzuki M;Iso N;Okabe T;Goto H;Hirata K;Shimizu J
尽管腿部肌肉力量对下肢运动表现（包括行走和坐立到站立的转换）有影响，但仍然难以预测双侧腿部肌肉力量与下肢表现之间的关系。因此，本研究旨在基于膝关节伸展力量，通过对数回归和线性回归的差异建模来预测下肢功能。
该研究纳入了121名居住在同一社区的个体。使用手持式测力计测量膝关节伸肌的双侧力量，并评估计时起立行走测试（TUG）的完成时间和5米最小步行时间，以预测下肢运动功能。在对数模型和线性模型上评估双侧标准化膝关节伸展肌肉力量以及包括行走或TUG完成时间在内的下肢运动功能得分。使用赤池信息准则（AIC）来评估对数回归模型和线性回归模型之间的系数兼容性。
对于步行时间，线性模型的AIC值低于对数模型。在线性模型的步行时间估计中，膝关节伸展力量的系数在较强一侧比在较弱一侧更大；然而，对于TUG完成时间，对数模型的AIC值低于线性模型。在对数模型的TUG完成时间估计中，膝关节伸展力量的系数在较弱一侧比在较强一侧更大。
总之，我们的研究展示了反映双腿力量与下肢表现（包括行走和TUG完成时间）之间关系的不同模型。
Despite the impact of leg muscle strength on lower extremity motor performance—including walking and sit-to-stand transfer—it remains difficult to predict the relationship between bilateral leg muscle strength and lower extremity performance. Therefore, this study was designed to predict lower extremity function through the differential modeling of logarithmic and linear regression, based on knee extension strength. The study included 121 individuals living in the same community. The bilateral strengths of the knee extensors were measured using a handheld dynamometer, and the Timed Up & Go test (TUG) performance time and 5-m minimum walking times were assessed to predict lower extremity motor functions. Bilateral normalized knee extension muscle strengths and lower extremity motor function scores, including walking or TUG performance times, were assessed on the logarithmic and linear models. The Akaike information criterion (AIC) was used to evaluate the coefficient compatibility between the logarithmic regression model and the linear regression model. The AIC value for the linear model was lower than that for the logarithmic model regarding the walking time. For walking time estimation in the linear model, the coefficient value of knee extension strength was larger on the strong than on the weak side; however, the AIC value for the logarithmic model was lower than that for the linear model regarding TUG performance time. In the logarithmic model's TUG performance time estimation, the coefficient value of knee extension strength was larger on the weak than on the strong side. In conclusion, our study demonstrated different models reflecting the relationship between both legs’ strengths and lower extremity performance, including the walking and TUG performance times.