García-Ramos Amador, Haff G Gregory, Padial Paulino, Feriche Belén
a Faculty of Sport Sciences, Department of Physical Education and Sport , University of Granada , Granada , Spain.
b Center for Exercise and Sport Science Research, Edith Cowan University , Joondalup , Australia.
Sports Biomech. 2018 Mar;17(1):117-130. doi: 10.1080/14763141.2016.1260767. Epub 2017 Feb 28.
This study aimed to examine the reliability of different power and velocity variables during the Smith machine bench press (BP) and bench press throw (BPT) exercises. Twenty-two healthy men conducted four testing sessions after a preliminary BP one-repetition maximum (1RM) test. In a counterbalanced order, participants performed two sessions of BP in one week and two sessions of BPT in another week. Mean propulsive power, peak power, mean propulsive velocity, and peak velocity at each tenth percentile (20-70% of 1RM) were recorded by a linear transducer. The within-participants coefficient of variation (CV) was higher for the load-power relationship compared to the load-velocity relationship in both the BP (5.3% vs. 4.1%; CV ratio = 1.29) and BPT (4.7% vs. 3.4%; CV ratio = 1.38). Mean propulsive variables showed lower reliability than peak variables in both the BP (5.4% vs. 4.0%, CV ratio = 1.35) and BPT (4.8% vs. 3.3%, CV ratio = 1.45). All variables were deemed reliable, with the peak velocity demonstrating the lowest within-participants CV. Based upon these findings, the peak velocity should be chosen for the accurate assessment of BP and BPT performance.
本研究旨在检验在史密斯机卧推（BP）和卧推投掷（BPT）练习中不同功率和速度变量的可靠性。22名健康男性在进行初步的BP一次重复最大值（1RM）测试后，进行了四次测试。参与者以平衡的顺序，在一周内进行两次BP测试，在另一周内进行两次BPT测试。通过线性传感器记录每个十分位数（1RM的20 - 70%）处的平均推进功率、峰值功率、平均推进速度和峰值速度。在BP（5.3%对4.1%；变异系数比值 = 1.29）和BPT（4.7%对3.4%；变异系数比值 = 1.38）中，与负荷 - 速度关系相比，负荷 - 功率关系的参与者内变异系数（CV）更高。在BP（5.4%对4.0%，变异系数比值 = 1.35）和BPT（4.8%对3.3%，变异系数比值 = 1.45）中，平均推进变量的可靠性均低于峰值变量。所有变量均被认为可靠，其中峰值速度的参与者内CV最低。基于这些发现，应选择峰值速度来准确评估BP和BPT的表现。
