Callaway Andrew J
Sensors (Basel). 2015 May 14;15(5):11363-86. doi: 10.3390/s150511363.
Objective data on swimming performance is needed to meet the demands of the swimming coach and athlete. The purpose of this study is to use a multiple inertial measurement units to calculate Lap Time, Velocity, Stroke Count, Stroke Duration, Stroke Rate and Phases of the Stroke (Entry, Pull, Push, Recovery) in front crawl swimming. Using multiple units on the body, an algorithm was developed to calculate the phases of the stroke based on the relative position of the body roll. Twelve swimmers, equipped with these devices on the body, performed fatiguing trials. The calculated factors were compared to the same data derived to video data showing strong positive results for all factors. Four swimmers required individual adaptation to the stroke phase calculation method. The developed algorithm was developed using a search window relative to the body roll (peak/trough). This customization requirement demonstrates that single based devices will not be able to determine these phases of the stroke with sufficient accuracy.
为满足游泳教练和运动员的需求,需要有关游泳表现的客观数据。本研究的目的是使用多个惯性测量单元来计算自由泳的圈数时间、速度、划水次数、划水持续时间、划水频率和划水阶段(入水、划水、推水、恢复)。通过在身体上使用多个单元,开发了一种算法,根据身体滚动的相对位置来计算划水阶段。十二名在身体上配备了这些设备的游泳运动员进行了疲劳试验。将计算出的因素与从视频数据得出的相同数据进行比较,所有因素均显示出强烈的积极结果。四名游泳运动员需要对划水阶段计算方法进行个性化调整。所开发的算法是使用相对于身体滚动(峰值/谷值)的搜索窗口开发的。这种定制要求表明,单一的设备无法足够准确地确定划水的这些阶段。