Virginia Commonwealth University.
University of Michigan.
J Appl Biomech. 2021 Jun 1;37(3):254-262. doi: 10.1123/jab.2020-0140. Epub 2021 Mar 8.
Novice runners experience a higher incidence of knee injury than experienced runners, which may be related to aberrant frontal and transverse plane kinematics. However, differences in kinematics between novice and experienced runners have not been fully explored. For this study, 10 novice and 10 experienced female runners ran on a treadmill at 2.68 m/s. Ankle, knee, and hip joint angles during the stance phase were measured using a 3-dimensional motion capture system and modeled using cubic splines. Spline models were compared between groups using a generalized linear model (α = .05). Ninety-five percent confidence intervals of the difference between joint angles throughout stance were constructed to identify specific periods of stance where groups differed in joint position. Angle-angle diagrams of ankle and hip position in the frontal and transverse planes were constructed to depict joint coordination. Novice runners displayed less hip adduction, but greater knee abduction and knee internal rotation compared to experienced runners. Differences in knee joint position may be explained by coordination of hip and ankle motion. Greater knee abduction and knee internal rotation displayed by novice runners compared with experienced runners may help to explain their higher risk for injury.
新手跑步者比经验丰富的跑步者更容易发生膝盖受伤，这可能与额状面和横断面上的运动学异常有关。然而，新手和经验丰富的跑步者之间的运动学差异尚未得到充分探索。在这项研究中，10 名新手和 10 名经验丰富的女性跑步者在跑步机上以 2.68 m/s 的速度跑步。使用三维运动捕捉系统测量了支撑阶段的踝关节、膝关节和髋关节角度，并使用三次样条进行建模。使用广义线性模型（α=0.05）比较组间的样条模型。构建关节角度在整个支撑阶段的差异的 95%置信区间，以确定支撑阶段中关节位置存在差异的特定时期。构建额状面和横断面上踝关节和髋关节位置的角度-角度图，以描述关节协调。与经验丰富的跑步者相比，新手跑步者的髋关节内收较少，但膝关节外展和膝关节内旋较大。膝关节位置的差异可能可以通过髋关节和踝关节运动的协调来解释。与经验丰富的跑步者相比，新手跑步者显示出更大的膝关节外展和膝关节内旋，这可能有助于解释他们受伤的风险更高。
