背景:这项研究的目的是比较带有线性编码器的PUSH带式设备在俯卧撑和卧推练习中测量不同负载下的运动速度的有效性和可靠性。
方法:20名受阻力训练的运动员在四种不同的负荷下进行俯卧撑和卧推练习:没有负重背心,10-20-30公斤重量背心,卧床:50-82%的他们假定的1次重复的最大值(1RM)在10公斤的步骤。线性编码器(Musclelab)和PUSH带在两次练习中都测量了平均和峰值速度。使用几种统计分析来研究带有线性编码器的PUSH带的有效性和可靠性。
结果:这项研究的主要发现表明,在两种运动的平均速度(r=0.62,0.70)和峰值速度(r=0.46,0.49)方面,PUSH波段和线性编码器之间仅有中等关联。此外,在两个测量设备之间观察到良好的一致性(峰值速度:ICC=0.60,0.64;平均速度:ICC=0.77,0.78).然而,在两种练习中,使用PUSH波段测量的速度值均较低,存在显著偏差.在俯卧撑中,线性编码器和PUSH波段都被认为非常可靠(ICC>0.98;变异系数(CV):5.9-7.3%)。PUSH波段的台式压力机可靠性下降(ICC<0.95),速度测量的变异系数增加到(12.8-13.3%)。用两个设备计算的1RM对于俯卧撑是相同的,与线性编码器相比,在台式压力机中,PUSH带低估了1RM14kg。
结论:得出的结论是,PUSH带将显示出在卧床运动中由于速度测量而降低的可靠性,并低估了基于1RM预测的负载速度。为了培训,PUSH波段可以在俯卧撑期间使用,然而,当使用该设备时,建议在增加负荷的情况下在卧推机上进行反馈。
BACKGROUND: The aim of this study was to compare the validity and reliability of a PUSH band device with a linear encoder to measure movement velocity with different loads during the push-up and bench press exercises.
METHODS: Twenty resistance-trained athletes performed push-up and bench press exercises with four different loads: without weight vest, 10-20-30 kg weight vest, bench press: 50-82% of their assumed 1 repetition maximum (1 RM) in steps of 10 kg. A linear encoder (Musclelab) and the PUSH band measured mean and peak velocity during both exercises. Several statistical analyses were used to investigate the validity and reliability of the PUSH band with the linear encoder.
RESULTS: The main findings of this study demonstrated only moderate associations between the PUSH band and linear encoder for mean velocity (r = 0.62, 0.70) and peak velocity (r = 0.46, 0.49) for both exercises. Furthermore, a good level of agreement (peak velocity: ICC = 0.60, 0.64; mean velocity: ICC = 0.77, 0.78) was observed between the two measurement devices. However, a significant bias was found with lower velocity values measured with the PUSH band in both exercises. In the push-up, both the linear encoder and PUSH band were deemed very reliable (ICC > 0.98; the coefficient of variation (CV): 5.9-7.3%). Bench press reliability decreased for the PUSH band (ICC < 0.95), and the coefficient of variance increased to (12.8-13.3%) for the velocity measures. Calculated 1 RM with the two devices was the same for the push-up, while in bench press the PUSH band under-estimated the 1 RM by 14 kg compared to the linear encoder.
CONCLUSIONS: It was concluded that the PUSH band will show decreased reliability from velocity measures in a bench press exercise and underestimate load-velocity based 1 RM predictions. For training, the PUSH band can be used during push-ups, however caution is suggested when using the device for the purposes of feedback in bench press at increasing loads.