Interest of inertial measurement unit tool in the functional evaluation of ankle evertor muscles in trail running

J. Dury, Fabrice Michel, G. Ravier
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Abstract

This study aimed to investigate the interest of inertial measurement units (IMU) in the functional assessment of the ankle to identify sport specific adaptations and to determine whether a hilly run session affected balance control and ability in accelerating eversion and slowing down inversion movements. Thirteen well-trained trail runners and 12 cyclists completed ankle tests on a destabilized footwear device: one balance-control test and two dynamic inversion and eversion tests (involving eccentric, ECC and concentric, CONC muscle regimens, respectively). Kinematic data derived from IMU were automatically calculated as performance scores i) to compare trail runners and cyclists at rest, and ii) to determine the fatigue induced by hilly run (16 km, 400 D+) in trail runners. Both ECC and CONC scores derived from angular velocity of twenty repetitions (with threshold of 60°/s and 250°/s, respectively) during dynamic tests. Results showed higher ECC score (CV = 14.6%; p = 0.06; ES = moderate) and lower CONC score (CV = −33.8%; p < 0.01; ES = large) in trail runners than in cyclists. Furthermore, proprioception score decreased in response to the hilly run session (CV = −6.1%; p = 0.03; ES = moderate). Kinematic data emphasized sport specific adaptations in the ability to control eversion and inversion movements. This might suggest differences in evertor muscle strength characteristics. Decrement in the proprioception score highlighted the interest of using IMU in the assessment of acute fatigue induced by hilly run.
惯性测量单元工具在越野跑中踝关节内伸肌功能评估中的应用
本研究旨在探讨惯性测量单元(IMU)在踝关节功能评估中的作用,以确定运动适应性,并确定丘陵跑是否会影响平衡控制和加速外翻和减缓倒立运动的能力。13名训练有素的越野跑运动员和12名自行车运动员在不稳定的鞋类装置上完成了脚踝测试:一次平衡控制测试和两次动态翻转和外翻测试(分别涉及偏心、ECC和同心、CONC肌肉方案)。从IMU中获得的运动学数据被自动计算为性能分数,i)比较越野跑者和自行车运动员在休息时的表现,ii)确定越野跑者在丘陵跑(16公里,400 D+)时的疲劳程度。在动态测试中,ECC和CONC分数均来源于20次重复的角速度(阈值分别为60°/s和250°/s)。结果:ECC评分较高(CV = 14.6%;p = 0.06;ES =中度)和较低的CONC评分(CV =−33.8%;p < 0.01;越野跑运动员比自行车运动员大。此外,本体感觉评分在丘陵跑后下降(CV = - 6.1%;p = 0.03;ES =中度)。运动学数据强调运动特定的适应能力,控制外翻和反转运动。这可能暗示了内伸肌力量特征的差异。本体感觉评分的下降突出了使用IMU评估丘陵跑步引起的急性疲劳的兴趣。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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