School of Athletic Performance, Shanghai University of Sport, Shanghai, China.
Université de Lyon, UCBL1, Laboratoire Interuniversitaire de Biologie de la Motricité, EA 7424, Villeurbanne Cedex, France.
J Sports Sci Med. 2023 Mar 1;22(1):166-174. doi: 10.52082/jssm.2023.166. eCollection 2023 Mar.
The present study aims to determine the test-retest reliability of the input signal (INPUT) of foot impact and soft tissue vibration (STV) of the lower limb muscles during treadmill running. Twenty-six recreational runners participated in three running trials at constant velocity (10 km/h) within two days. The INPUT and STV of gastrocnemius medialis (GAS) and vastus lateralis (VL) were extracted from 100 steps measured by three triaxial accelerometers. The Intraclass Correlation Coefficient (ICC) was calculated to determine the Intra-trial and Inter-day reliability of the different variables. Intra-trial reliability results indicated that most of the INPUT and GAS STV parameters, except for damping coefficient and setting time, have good to excellent reliability (0.75 < ICC < 0.9) from the beginning of the run (10 steps) to the end. In contrast, only 4 VL STV parameters showed good reliability. Furthermore, inter-trial reliability measured on day one showed that the number of reliable parameters reduced, especially for VL STV, and more steps were required (20 < steps < 80) to achieve good reliability. Inter-day reliability results showed that only one VL STV parameter reached good reliability. Therefore, the present results show that the measurement of the foot impact and the calf muscle vibrations present a good to excellent reliability measured on a single trial and two trials carried out on the same day. The reliability of these parameters remains good when comparing two days of experimentation. We recommend measuring impact and STV parameters during treadmill running in the same session.
本研究旨在确定在跑步机跑步过程中，脚部冲击的输入信号（INPUT）和下肢肌肉的软组织振动（STV）的重测信度。26 名休闲跑步者在两天内以恒定速度（10km/h）进行了三次跑步试验。通过三个三轴加速度计测量的 100 步中提取了腓肠肌内侧（GAS）和股外侧肌（VL）的 INPUT 和 STV。采用组内相关系数（ICC）来确定不同变量的组内和日内可靠性。组内可靠性结果表明，除了阻尼系数和设定时间外，大多数 INPUT 和 GAS STV 参数（0.75<ICC<0.9）从跑步开始（10 步）到结束都具有良好到极好的可靠性。相比之下，只有 4 个 VL STV 参数表现出良好的可靠性。此外，第一天的组间可靠性测量结果表明，可靠参数的数量减少，特别是对于 VL STV，并且需要更多的步数（20<步数<80）才能达到良好的可靠性。两天间的可靠性结果表明，只有一个 VL STV 参数达到了良好的可靠性。因此，本研究结果表明，在单个试验和同一天进行的两次试验中，脚部冲击和小腿肌肉振动的测量具有良好到极好的可靠性。当比较两天的实验时，这些参数的可靠性仍然良好。我们建议在同一次会话中测量跑步机跑步时的冲击和 STV 参数。
