Cárdenas-Rodríguez Miguel Fernando, Paute-Tigre Cristhian Geovanny, Bueno-Palomeque Freddy Leonardo
Applied Embedded Hardware Research Group (GIHEA), Universidad Politécnica Salesiana, Cuenca, Ecuador.
J Med Signals Sens. 2023 Aug 31;13(4):290-299. doi: 10.4103/jmss.jmss_61_22. eCollection 2023 Oct-Dec.
Monitoring and evaluation of the techniques used in weightlifting are based on the subjective observation of the coach, which can ignore important aspects of short duration. This study aimed to implement an embedded system to register the angular variation of the hip, knee, and ankle joints, and plantar pressure during training.
Four professional and four amateur athletes performed five snatch lifts. To evaluate the angular measurement, the tests were simultaneously videotaped and the results were contrasted.
The angular data presented a correlation coefficient of 0.92 and a delay of 495 ± 200 ms. The characterization of the sensors was implemented in a microcontroller with a mean absolute percentage error of 18.8% in the measurements. When comparing the average results between the elite and amateur groups, the amateur group performed a delayed descent in the first three phases of the lift and an accelerated descent in the fourth phase. A not uniform plantar pressure was registered in the same group, causing a reduction in the final speed of recovery with the barbell.
The proposed system has been developed for biaxial angular registration of hip, knee, ankle, and plantar pressure during weightlifting snatch. The option to contrast between signals presented by the system met the requirements requested by the coaching staff and is seen as a promising quantitative analysis tool to support the coach and the athlete.
举重技术的监测与评估基于教练的主观观察，这可能会忽略短时间内的重要方面。本研究旨在实现一个嵌入式系统，用于记录训练期间髋、膝和踝关节的角度变化以及足底压力。
四名专业运动员和四名业余运动员进行了五次抓举。为评估角度测量，测试过程同时进行录像，并对结果进行对比。
角度数据的相关系数为0.92，延迟为495±200毫秒。传感器的特性在微控制器中实现，测量的平均绝对百分比误差为18.8%。比较精英组和业余组的平均结果时，业余组在举重的前三个阶段下降延迟，在第四阶段下降加速。同一组中记录到足底压力不均匀，导致杠铃恢复的最终速度降低。
所提出的系统已开发用于举重抓举期间髋、膝、踝关节和足底压力的双轴角度记录。系统所提供的信号对比选项满足了教练团队的要求，被视为支持教练和运动员的有前景的定量分析工具。
