Fernández-Valdés Bruno, Jones Ben, Hendricks Sharief, Weaving Dan, Ramirez-Lopez Carlos, Whitehead Sarah, Toro-Román Víctor, Trabucchi Michela, Moras Gerard
Research Group in Technology Applied to High Performance and Health, TecnoCampus, Department of Health Sciences, Universitat Pompeu Fabra, 08302 Barcelona, Spain.
Carnegie Applied Rugby Research (CARR) Centre, Carnegie School of Sport, Leeds Beckett University, Leeds LS1 3HE, UK.
Sensors (Basel). 2024 Dec 11;24(24):7910. doi: 10.3390/s24247910.
Several microtechnology devices quantify the external load of team sports using Global Positioning Systems sampling at 5, 10, or 15 Hz. However, for short, explosive actions, such as collisions, these sample rates may be limiting. It is known that very high-frequency sampling is capable of capturing changes in actions over a short period of time. Therefore, the aim of this study was to compare the mean acceleration and entropy values obtained from 100 Hz and 1000 Hz tri-axial accelerometers in tackling actions performed by rugby players. A total of 11 elite adolescent male rugby league players (mean ± SD; age: 18.5 ± 0.5 years; height: 179.5 ± 5.0 cm; body mass: 88.3 ± 13.0 kg) participate in this study. Participants performed tackles ( = 200), which were recorded using two triaxial accelerometers sampling at 100 Hz and 1000 Hz, respectively. The devices were placed together inside the Lycra vests on the players' backs. The mean acceleration, sample entropy (SampEn), and approximate entropy (ApEn) were analyzed. In mean acceleration, the 1000 Hz accelerometer obtained greater values ( < 0.05). However, SampEn and ApEn were greater with the 100 Hz accelerometer ( < 0.05). A large relationship was observed between the two devices in all the parameters analyzed (R > 0.5; < 0.0001). Sampling frequency can affect the quality of the data collected, and a higher sampling frequency potentially allows for the collection of more accurate motion data. A frequency of 1000 Hz may be suitable for recording short and explosive actions.
几种微技术设备通过以5赫兹、10赫兹或15赫兹的频率进行全球定位系统采样来量化团队运动的外部负荷。然而，对于诸如碰撞等短暂、爆发性的动作，这些采样率可能存在局限性。众所周知，超高频采样能够捕捉短时间内动作的变化。因此，本研究的目的是比较100赫兹和1000赫兹三轴加速度计在橄榄球运动员擒抱动作中获得的平均加速度和熵值。共有11名精英青少年男性橄榄球联盟球员（平均值±标准差；年龄：18.5±0.5岁；身高：179.5±5.0厘米；体重：88.3±13.0千克）参与了本研究。参与者进行了擒抱动作（n = 200），分别使用两个以100赫兹和1000赫兹采样的三轴加速度计进行记录。这些设备一起放置在球员背部的莱卡背心内。分析了平均加速度、样本熵（SampEn）和近似熵（ApEn）。在平均加速度方面，1000赫兹的加速度计获得了更大的值（P < 0.05）。然而，100赫兹的加速度计的样本熵和近似熵更大（P < 0.05）。在所有分析的参数中，两种设备之间都观察到了很强的相关性（R > 0.5；P < 0.0001）。采样频率会影响所收集数据的质量，更高的采样频率可能允许收集更准确的运动数据。1000赫兹的频率可能适合记录短暂、爆发性的动作。
