Alexander Nathalie, Strutzenberger Gerda, Ameshofer Lisa Maria, Schwameder Hermann
Department of Sport Science and Kinesiology, University of Salzburg, Salzburg, Austria.
Department of Sport Science and Kinesiology, University of Salzburg, Salzburg, Austria.
J Biomech. 2017 Aug 16;61:75-80. doi: 10.1016/j.jbiomech.2017.07.001. Epub 2017 Jul 11.
Work performance and individual joint contribution to total work are important information for creating training protocols, but were not assessed so far for sloped walking. Therefore, the purpose of this study was to analyze lower limb joint work and joint contribution of the hip, knee and ankle to total lower limb work during sloped walking in a healthy population. Eighteen male participants (27.0±4.7yrs, 1.80±0.05m, 74.5±8.2kg) walked on an instrumented ramp at inclination angles of 0°, ±6°, ±12° and ±18° at 1.1m/s. Kinematic and kinetic data were captured using a motion-capture system (Vicon) and two force plates (AMTI). Joint power curves, joint work (positive, negative, absolute) and each joint's contribution to total lower limb work were analyzed throughout the stance phase using an ANOVA with repeated measures. With increasing inclination positive joint work increased for the ankle and hip joint and in total during uphill walking. Negative joint work increased for each joint and in total work during downhill walking. Absolute work was increased during both uphill (all joints) and downhill (ankle & knee) walking. Knee joint contribution to total negative and absolute work increased during downhill walking while hip and ankle contributions decreased. This study identified, that, when switching from level to a 6° and from 6° to a 12° inclination the gain of individual joint work is more pronounced compared to switching from 12° to an 18° inclination. The results might be used for training recommendations and specific training intervention with respect to sloped walking.
工作表现以及个体关节对总功的贡献是制定训练方案的重要信息，但目前尚未对斜坡行走进行评估。因此，本研究的目的是分析健康人群在斜坡行走过程中下肢关节功以及髋、膝和踝关节对下肢总功的关节贡献。18名男性参与者（年龄27.0±4.7岁，身高1.80±0.05米，体重74.5±8.2千克）以1.1米/秒的速度在装有仪器的斜坡上行走，斜坡倾斜角度分别为0°、±6°、±12°和±18°。使用运动捕捉系统（Vicon）和两个测力板（AMTI）采集运动学和动力学数据。在整个站立阶段，采用重复测量方差分析对关节功率曲线、关节功（正功、负功、总功）以及每个关节对下肢总功的贡献进行分析。随着倾斜度增加，上坡行走时踝关节和髋关节的正功以及总正功增加。下坡行走时，每个关节的负功以及总负功增加。上坡（所有关节）和下坡（踝关节和膝关节）行走时总功均增加。下坡行走时膝关节对总负功和总功的贡献增加，而髋关节和踝关节的贡献减少。本研究发现，从水平路面转换到6°倾斜路面以及从6°转换到12°倾斜路面时，个体关节功的增加比从12°转换到18°倾斜路面时更为显著。这些结果可用于斜坡行走的训练建议和特定训练干预。
