Fuentes Alex D, Smith Connor J, Shoepe Todd C
Human Performance Laboratory, Department of Health and Human Sciences, Loyola Marymount University, Los Angeles, CA 90045, USA.
Sports (Basel). 2019 Jan 16;7(1):21. doi: 10.3390/sports7010021.
Variable resistance implemented through concurrent use of rubber-based resistance bands and free weights is commonly used in training athletes. The purpose of this study was to examine the consistency of rubber-based resistance (RBR) band loading patterns across four distributors. Bands ( = 141) were obtained from online distributors (Rogue Fitness, EliteFTS, RubberBanditz, and Power Systems) across a spectrum of available widths (0.635, 1.270, 2.860, 4.450, 6.350, and 10.160 cm). At least five bands for each width were stretched in 5 cm increments from resting (100 cm) to twice resting length (200 cm) while tensile resistance was measured using a load cell integrated with a digital controller. Each band was tested twice on non-consecutive days producing an intertrial intraclass correlational coefficient (ICC) between 0.93⁻0.99 with a grand mean ICC across all repeated measures of 0.99. Statistical differences were observed in mean resistance for bands of equal thickness across distributors. Significant correlations were found between a range of tensile load expressed as a total load and band thickness ( = 0.658) and when expressed as a percentage ( = -0.386). This study is useful for strength and conditioning professionals and clinicians who should be cognizant of loading variability within both bandwidths and between distributors.
通过同时使用橡胶阻力带和自由重量器械实现的可变阻力常用于运动员训练。本研究的目的是检验四个经销商提供的橡胶基阻力（RBR）带加载模式的一致性。从在线经销商（Rogue Fitness、EliteFTS、RubberBanditz和Power Systems）处获取了一系列不同宽度（0.635、1.270、2.860、4.450、6.350和10.160厘米）的阻力带（n = 141）。对于每个宽度的阻力带，至少五条从静止状态（100厘米）开始，以5厘米的增量拉伸至静止长度的两倍（200厘米），同时使用与数字控制器集成的测力传感器测量拉伸阻力。每条阻力带在非连续的日子里测试两次，得出的试验间组内相关系数（ICC）在0.93至0.99之间，所有重复测量的总体平均ICC为0.99。观察到不同经销商提供的相同厚度阻力带的平均阻力存在统计学差异。在以总负荷表示的一系列拉伸负荷与阻力带厚度之间发现了显著相关性（r = 0.658），以百分比表示时也存在显著相关性（r = -0.386）。本研究对于体能训练专业人员和临床医生很有用，他们应该认识到带宽内以及不同经销商之间的负荷变异性。
