Lake Jason P, Augustus Simon, Austin Kieran, Mundy Peter, McMahon John J, Comfort Paul, Haff Guy G
Chichester Institute of Sport, University of Chichester, Chichester PO19 6PE, UK.
Centre for Sport, Exercise and Life Sciences, Coventry University, Coventry CV1 5FB, UK.
Sports (Basel). 2018 Nov 5;6(4):140. doi: 10.3390/sports6040140.
The Push Band has the potential to provide a cheap and practical method of measuring velocity and power during countermovement vertical jumping (CMJ). However, very little is known about whether it conforms to laboratory-based gold standards. The aim of this study was to assess the agreement between peak and mean velocity and power obtained from the belt-worn Push Band, and derived from three-dimensional motion capture, and vertical force from an in-ground force platform. Twenty-two volunteers performed 3 CMJ on a force platform, while a belt-worn Push Band and a motion capture system (a marker affixed to the Push Band) simultaneously recorded data that enabled peak and mean velocity and power to be calculated and then compared using ordinary least products regression. While the Push Band is reliable, it tends to overestimate peak (9⁻17%) and mean (24⁻27%) velocity, and when compared to force plate-derived peak and mean power, it tends to underestimate (40⁻45%) and demonstrates fixed and proportional bias. This suggests that while the Push Band may provide a useful method for measuring peak and mean velocity during the CMJ, researchers and practitioners should be mindful of its tendency to systematically overestimate and that its measures of peak and mean power should not be used.
推带有可能提供一种在反向垂直跳跃（CMJ）过程中测量速度和功率的廉价且实用的方法。然而，对于它是否符合基于实验室的黄金标准，人们知之甚少。本研究的目的是评估佩戴在腰部的推带所获得的峰值和平均速度及功率，与通过三维运动捕捉得出的结果以及地面力平台的垂直力之间的一致性。22名志愿者在力平台上进行了3次CMJ，同时，佩戴在腰部的推带和一个运动捕捉系统（一个固定在推带上的标记物）同步记录数据，以便计算峰值和平均速度及功率，然后使用普通最小乘积回归进行比较。虽然推带是可靠的，但它往往会高估峰值速度（9%-17%）和平均速度（24%-27%），并且与力板得出的峰值和平均功率相比，它往往会低估（40%-45%），并表现出固定和比例偏差。这表明，虽然推带可能为测量CMJ过程中的峰值和平均速度提供一种有用的方法，但研究人员和从业者应注意其系统高估的倾向，且不应使用其峰值和平均功率的测量结果。
