Urbaczka J, Silvernail J F, Jandacka D
Department of Human Movement Studies, University of Ostrava, Ostrava, Czech Republic.
Department of Kinesiology and Nutrition Sciences, University of Nevada, Las Vegas, USA.
Sports Biomech. 2025 Mar;24(3):708-722. doi: 10.1080/14763141.2022.2146909. Epub 2022 Dec 1.
The aim of this study was to compare selected ankle and knee kinematic and kinetic parameters before and a fter a prolonged exhaustive treadmill run between two groups of non-rearfoot footstrike pattern (NRFP) runners with different training volumes. Twenty-eight habitual NRFP runners were assigned to two groups based on their weekly training volume (Highly-trained (HT)/Moderately-trained (MT)). Participants underwent the VO2max test, and the exhaustive treadmill ran with biomechanical analysis at the beginning and the end. The two-way RMANOVA was used to assess differences between the groups and the phase of the run. A paired t-test was used for post-hoc analysis in case of significant interaction effect. Kinetic results showed significant group effect for ankle plantarflexion moment and hip external rotation moment (end-phase: both greater in MT group). Kinematic results showed significant group×phase interaction for ankle dorsiflexion angle (end-phase: greater in MT group) at initial contact (IC), peak knee flexion angle (end-phase: greater in MT group), and peak ankle eversion angle during the stance phase (end-phase: greater in HT group). Additionally, a group effect was found for knee flexion angle at IC (end-phase: greater in HT group). This study suggests that HT healthy NRFP runners may have less potential for increased biomechanical risk of AT overload during an exhaustive run.
本研究的目的是比较两组不同训练量的非后足着地模式（NRFP）跑步者在长时间力竭性跑步机跑步前后的选定踝关节和膝关节运动学及动力学参数。28名习惯性NRFP跑步者根据其每周训练量被分为两组（高训练量组（HT）/中等训练量组（MT））。参与者进行了最大摄氧量测试，并在开始和结束时进行了力竭性跑步机跑步及生物力学分析。采用双向重复测量方差分析来评估组间差异和跑步阶段差异。若存在显著交互效应，则使用配对t检验进行事后分析。动力学结果显示，踝关节跖屈力矩和髋关节外旋力矩存在显著的组间效应（结束阶段：MT组均更大）。运动学结果显示，在初始接触（IC）时踝关节背屈角度、膝关节屈曲峰值角度（结束阶段：MT组更大）以及站立阶段踝关节外翻峰值角度（结束阶段：HT组更大）存在显著的组×阶段交互效应。此外，还发现IC时膝关节屈曲角度存在组间效应（结束阶段：HT组更大）。本研究表明，高训练量的健康NRFP跑步者在力竭性跑步期间发生踝关节过度负荷生物力学风险增加的可能性可能较小。
