Lorenzetti Silvio, Lamparter Thomas, Lüthy Fabian
Institute for Biomechanics, HCP H 21.1, ETH Zurich, Leopold-Ruzicka-Weg 4, 8093, Zurich, Switzerland.
Swiss Federal Institute of Sport Magglingen (SFISM), 2532, Magglingen, Switzerland.
BMC Res Notes. 2017 Dec 6;10(1):707. doi: 10.1186/s13104-017-3012-z.
The velocity of a barbell can provide important insights on the performance of athletes during strength training. The aim of this work was to assess the validity and reliably of four simple measurement devices that were compared to 3D motion capture measurements during squatting. Nine participants were assessed when performing 2 × 5 traditional squats with a weight of 70% of the 1 repetition maximum and ballistic squats with a weight of 25 kg. Simultaneously, data was recorded from three linear position transducers (T-FORCE, Tendo Power and GymAware), an accelerometer based system (Myotest) and a 3D motion capture system (Vicon) as the Gold Standard. Correlations between the simple measurement devices and 3D motion capture of the mean and the maximal velocity of the barbell, as well as the time to maximal velocity, were calculated.
The correlations during traditional squats were significant and very high (r = 0.932, 0.990, p < 0.01) and significant and moderate to high (r = 0.552, 0.860, p < 0.01). The Myotest could only be used during the ballistic squats and was less accurate. All the linear position transducers were able to assess squat performance, particularly during traditional squats and especially in terms of mean velocity and time to maximal velocity.
杠铃的速度可为运动员力量训练期间的表现提供重要见解。本研究的目的是评估四种简单测量设备的有效性和可靠性，并将其与深蹲过程中的三维运动捕捉测量结果进行比较。九名参与者在进行两组传统深蹲（重量为1次最大重复量的70%）和25千克重量的快速深蹲时接受评估。同时，记录来自三个线性位置传感器（T-FORCE、Tendo Power和GymAware）、一个基于加速度计的系统（Myotest）以及作为金标准的三维运动捕捉系统（Vicon）的数据。计算了简单测量设备与杠铃平均速度、最大速度以及达到最大速度时间的三维运动捕捉之间的相关性。
传统深蹲期间的相关性显著且非常高（r = 0.932、0.990，p < 0.01），以及显著且中等至高（r = 0.552、0.860，p < 0.01）。Myotest仅能在快速深蹲期间使用，且准确性较低。所有线性位置传感器都能够评估深蹲表现，特别是在传统深蹲期间，尤其是在平均速度和达到最大速度时间方面。
