Research Group in Prevention and Health in Exercise and Sport, University of Valencia, 46010 Valencia, Spain.
Exercise and Rehabilitation Sciences Institute, School of Physical Therapy, Faculty of Rehabilitation Sciences, Universidad Andres Bello, 7591538 Santiago, Chile.
Int J Environ Res Public Health. 2022 Dec 10;19(24):16616. doi: 10.3390/ijerph192416616.
The objective was to compare the mean propulsive velocity (MPV), maximum power (PMAX), heart rate, and rate of perceived exertion (RPE) during the parallel squat using elastic bands (EB) or weight plates (WP) to load the bar. The effect of relative strength on the dependent variables was analysed. Additionally, the potential of the RPE to predict external load parameters was assessed. Eighteen trained volunteers squatted at 40%, 55%, 70%, and 85% of their one-repetition maximum with EB and WP (a total of eight sets) in random order. Dependent variables were measured at the first and last repetition (i.e., 10% velocity loss). Two identical sessions were conducted to assess the reliability of measurements. Compared to WP, EB allowed a significantly greater number of repetitions, MPV, and PMAX, and significantly lower RPE. The RPE of the first repetition was a significant predictor of the external load of the set. The RPE showed good repeatability and was not influenced by the relative strength of athletes. In conclusion, compared to WP, the use of EB allows for greater external load with reduced internal load responses in a wide spectrum of load-based intensities. The potential implications of these novel findings are discussed in the manuscript.
目的是比较使用弹性带（EB）或重量板（WP）加载杠铃进行平行深蹲时的平均推进速度（MPV）、最大功率（PMAX）、心率和主观用力感觉等级（RPE）。分析相对强度对因变量的影响。此外，还评估了 RPE 预测外部负荷参数的潜力。18 名训练有素的志愿者以其 1 次重复最大重量的 40%、55%、70%和 85%的比例，用 EB 和 WP（总共 8 组）以随机顺序进行深蹲。在第一次和最后一次重复（即 10%速度损失）时测量因变量。进行了两次相同的测试，以评估测量的可靠性。与 WP 相比，EB 允许进行更多的重复次数、MPV 和 PMAX，并且 RPE 显著降低。第一次重复的 RPE 是一组外部负荷的显著预测因子。RPE 具有良好的可重复性，不受运动员相对强度的影响。总之，与 WP 相比，EB 的使用允许在广泛的基于负荷的强度范围内，用更低的内部负荷反应产生更大的外部负荷。本文讨论了这些新发现的潜在意义。
