School of Exercise Science, Physical and Health Education, University of Victoria, Victoria, BC V8P 5C2, Canada.
Canadian Sport Institute Pacific, Victoria, BC V9E 2C5, Canada.
Sensors (Basel). 2024 Sep 20;24(18):6085. doi: 10.3390/s24186085.
Boat acceleration profiles can provide valuable information for coaches and practitioners to make meaningful technical interventions and monitor the determinants of success in rowing. Previous studies have used simple feature detection methods to identify key phases within individual strokes, such as drive onset, drive time, drive offset and stroke time. However, based on skill level, technique or boat class, the hull acceleration profile can differ, making robust feature detection more challenging. The current study's purpose is to employ the undecimated wavelet transform (UWT) technique to detect individual features in the stroke acceleration profile from a single rowing hull-mounted accelerometer. In this investigation, the temporal and kinematic values obtained using the AdMos sensor in conjunction with the UWT processing approach were strongly correlated with the comparative measures of the Peach™ instrumented oarlock system. The measures for stroke time displayed very strong agreeability between the systems for all boat classes, with ICC values of 0.993, 0.963 and 0.954 for the W8+, W4- and W1x boats, respectively. Similarly, the drive time was also very consistent, with strong to very strong agreeability, producing ICC values of 0.937, 0.901 and 0.881 for the W8+, W4- and W1x boat classes. Further, a Bland-Altman analysis displayed little to no bias between the AdMos-derived and Peach™ measures, indicating that there were no systematic discrepancies between signals. This single-sensor solution could form the basis for a simple, cost-effective and accessible alternative to multi-sensor instrumented systems for the determination of sub-stroke kinematic phases.
赛艇船艇的加速度曲线可以为教练员和运动员提供有价值的信息，以便进行有意义的技术干预，并监测赛艇成功的决定因素。之前的研究已经使用了简单的特征检测方法来识别单个划桨周期中的关键阶段，例如划桨启动、划桨时间、划桨结束和划桨时间。然而，基于技术水平、技术或船艇级别，船体的加速度曲线可能会有所不同，这使得稳健的特征检测更加具有挑战性。本研究的目的是使用非抽取小波变换（UWT）技术从单个赛艇船体安装的加速度计中检测划桨加速度曲线中的各个特征。在本研究中，使用 AdMos 传感器结合 UWT 处理方法获得的时间和运动学值与 Peach 仪器桨锁系统的比较测量值密切相关。对于所有船艇级别，划桨时间的测量值在两个系统之间具有非常强的一致性，ICC 值分别为 0.993、0.963 和 0.954。同样，划桨时间也非常一致，具有强到非常强的一致性，产生的 ICC 值分别为 0.937、0.901 和 0.881。此外，Bland-Altman 分析显示，AdMos 衍生的测量值和 Peach 测量值之间几乎没有偏差，表明信号之间没有系统差异。这种单传感器解决方案可以为多传感器仪器系统的替代方案提供基础，用于确定次划桨运动学阶段，这种替代方案简单、具有成本效益且易于使用。
