Agreement between an inertial measurement unit (IMU) algorithm and a photoelectric system for analysing spatiotemporal variables during overground and treadmill running.

IF 2 3区 医学 Q3 ENGINEERING, BIOMEDICAL
Unai Miqueleiz, Roberto Aguado-Jimenez, Pablo Lecumberri, Esteban M Gorostiaga
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引用次数: 0

Abstract

The aim of this study was to assess the agreement between running stride variables measured simultaneously with an inertial sensor (MTw IMU) using a specific algorithm, and a floor-based photoelectric (Optojump; OJ) system among well-trained endurance runners, during overground and treadmill runs at speeds ranging from 9 to 21 km∙h-1. Five different filter settings (from 0_0 to 4_4) were used with the OJ to detect the contact event, based on the number of LEDs (from 1 to 5). No significant differences (p > 0.05) were found between the two devices in any of the stride variables when the 4_4 filter was implemented using the OJ. The agreement was good for contact time (CT) and flight time (FT) [r = 0.81-0.93; Typical error of the estimate (TEE%) = 3.2-7.5%], whereas for stride frequency (SF), stride length (SL) and stride time (ST) the agreement was almost perfect (r = 0.91-0.99; TEE% = 0.2-1.7%). The agreement worsened as the number of activated LEDs used to detect the contact event decreased. This suggests that the tested inertial sensor using a specific algorithm can achieve highly precise measurement of spatiotemporal parameters during both overground and treadmill running, compared to the OJ (4_4) system.

惯性测量单元(IMU)算法与光电系统之间的协议,用于分析地上和跑步机上运行时的时空变量。
本研究的目的是评估使用特定算法的惯性传感器(MTw IMU)同时测量的跑步步幅变量与基于地板的光电(Optojump;在训练有素的耐力跑者中,在地上和跑步机上以9至21 km∙h-1的速度跑。根据led的数量(从1到5),OJ使用五种不同的滤波器设置(从0到4_4)来检测接触事件。当使用OJ实现4_4滤波器时,在任何跨步变量中,两个设备之间没有发现显着差异(p > 0.05)。接触时间(CT)和飞行时间(FT)的一致性较好[r = 0.81-0.93;典型误差(TEE%) = 3.2 ~ 7.5%,而步频(SF)、步幅(SL)和步幅时间(ST)的估计基本一致(r = 0.91 ~ 0.99;t % = 0.2-1.7%)。随着用于检测接触事件的激活led数量的减少,协议变得更糟。这表明,与OJ(4_4)系统相比,使用特定算法的测试惯性传感器可以在地面和跑步机上实现高精度的时空参数测量。
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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来源期刊
Sports Biomechanics
Sports Biomechanics 医学-工程:生物医学
CiteScore
5.70
自引率
9.10%
发文量
135
审稿时长
>12 weeks
期刊介绍: Sports Biomechanics is the Thomson Reuters listed scientific journal of the International Society of Biomechanics in Sports (ISBS). The journal sets out to generate knowledge to improve human performance and reduce the incidence of injury, and to communicate this knowledge to scientists, coaches, clinicians, teachers, and participants. The target performance realms include not only the conventional areas of sports and exercise, but also fundamental motor skills and other highly specialized human movements such as dance (both sport and artistic). Sports Biomechanics is unique in its emphasis on a broad biomechanical spectrum of human performance including, but not limited to, technique, skill acquisition, training, strength and conditioning, exercise, coaching, teaching, equipment, modeling and simulation, measurement, and injury prevention and rehabilitation. As well as maintaining scientific rigour, there is a strong editorial emphasis on ''reader friendliness''. By emphasising the practical implications and applications of research, the journal seeks to benefit practitioners directly. Sports Biomechanics publishes papers in four sections: Original Research, Reviews, Teaching, and Methods and Theoretical Perspectives.
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