Department of Competitive Sports, Tokai University, Kanagawa, Japan.
Faculty of Education, Kansai University of Social Welfare, Hyogo, Japan.
J Strength Cond Res. 2024 May 1;38(5):985-990. doi: 10.1519/JSC.0000000000004737. Epub 2024 Feb 13.
Tanji, F, Ohnuma, H, Ando, R, Yamanaka, R, Ikeda, T, and Suzuki, Y. Longer ground contact time is related to a superior running economy in highly trained distance runners. J Strength Cond Res 38(5): 985-990, 2024-Running economy is a key component of distance running performance and is associated with gait parameters. However, there is no consensus of the link between the running economy (RE), ground contact time, and footstrike patterns. Thus, this study aimed to clarify the relationship between RE, ground contact time, and thigh muscle cross-sectional area (CSA) in highly trained distance runners and to compare these parameters between 2 habitual footstrike patterns (midfoot vs. rearfoot). Seventeen male distance runners ran on a treadmill to measure RE and gait parameters. We collected the CSAs of the right thigh muscle using a magnetic resonance imaging scanner. The RE had a significant negative relationship with distance running performance ( r = -0.50) and ground contact time ( r = -0.51). The ground contact time had a significant negative relationship with the normalized CSAs of the vastus lateralis muscle ( r = -0.60) and hamstrings ( r = -0.54). No significant differences were found in RE, ground contact time, or normalized CSAs of muscles between midfoot ( n = 10) and rearfoot ( n = 7) strikers. These results suggest that large CSAs of knee extensor muscles results in short ground contact time and worse RE. The effects of the footstrike pattern on the RE appear insignificant, and the preferred footstrike pattern can be recommended for running in highly trained runners.
谷，F，大沼，H，安藤，R，山中，R，池田，T，铃木，Y。在高水平长跑运动员中，较长的触地时间与更优的跑步经济性相关。《力量与体能研究杂志》38(5)：985-990，2024-跑步经济性是长跑表现的一个关键组成部分，与步态参数相关。然而，对于跑步经济性（RE）、触地时间和足触地方式之间的联系，目前尚无共识。因此，本研究旨在阐明高水平长跑运动员的 RE、触地时间与大腿肌肉横截面积（CSA）之间的关系，并比较这两个习惯足触地方式（中足着地与后足着地）之间的这些参数。17 名男性长跑运动员在跑步机上跑步以测量 RE 和步态参数。我们使用磁共振成像扫描仪收集右侧大腿肌肉的 CSA。RE 与长跑表现（r=-0.50）和触地时间（r=-0.51）呈显著负相关。触地时间与股外侧肌（r=-0.60）和腘绳肌（r=-0.54）的标准化 CSA 呈显著负相关。中足着地（n=10）和后足着地（n=7）跑者之间的 RE、触地时间或肌肉标准化 CSA 没有显著差异。这些结果表明，膝关节伸肌的大 CSA 导致较短的触地时间和更差的 RE。足触地方式对 RE 的影响似乎并不显著，因此可以为高水平跑者推荐其偏好的足触地方式。
