Chaves Suene F N, Rocha-JÚnior Valdinar A, EncarnaÇÃo Irismar G A, Martins-Costa Hugo C, Freitas Eduardo D S, Coelho Daniel B, Franco Frederico S C, Loenneke Jeremy P, Bottaro Martim, Ferreira-JÚnior JoÃo B
Federal Institute of Sudeste of Minas Gerais, Rio Pomba, MG, BRAZIL.
National Police Academy, Federal Police, Brasília, DF, BRAZIL.
Int J Exerc Sci. 2020 Aug 1;13(6):859-872. doi: 10.70252/FDNB1158. eCollection 2020.
The aim of the current study was to investigate the effects of horizontal and incline bench press as well as the combination of both exercises on neuromuscular adaptation in untrained young men. Forty-seven untrained men were randomly assigned to one of the three groups: 1) a horizontal bench press group (n= 15), 2) an incline bench press group (n= 15), and 3) a combination (horizontal + incline) group (n= 17). Training was conducted once a week for eight weeks, with equalized number of sets among groups. Muscle thickness, isometric strength and electromyography (EMG) amplitude of the pectoralis major were measured one week before and after the training period. There was no difference between groups for the change in horizontal bench press isometric strength (~ 10 kg increase, p=0.776) or incline bench press isometric strength (~ 11 kg increase, p=0.333). Changes in muscle thickness differed only in one of the three sites. The changes in the second intercostal space of the pectoralis major was greatest in the incline pressure group compared with the horizontal [mean difference (95% CI) of 0.62 (0.23, 1.0) cm, p=0.003] and combination groups [mean difference (95% CI) of 0.50 (0.14, 0.86) cm, p=0.008]. The change in EMG amplitude following training differed between groups in only one out of the four sites. The present results indicate that strength and conditioning professionals might consider that horizontal and incline bench press exercises, or a combination of both exercises can render similar change in general strength.
本研究的目的是调查水平卧推和斜卧推以及这两种练习的组合对未经训练的年轻男性神经肌肉适应性的影响。47名未经训练的男性被随机分为三组之一：1）水平卧推组（n = 15），2）斜卧推组（n = 15），3）组合（水平+斜卧）组（n = 17）。训练每周进行一次，共八周，各组的训练组数相等。在训练期前后一周测量胸大肌的肌肉厚度、等长力量和肌电图（EMG）幅度。水平卧推等长力量的变化（增加约10 kg，p = 0.776）或斜卧推等长力量的变化（增加约11 kg，p = 0.333）在各组之间没有差异。肌肉厚度的变化仅在三个部位之一有所不同。与水平卧推组[平均差异（95%CI）为0.62（0.23，1.0）cm，p = 0.003]和组合组[平均差异（95%CI）为0.50（0.14，0.86）cm，p = 0.008]相比，斜卧推组胸大肌第二肋间空间的变化最大。训练后EMG幅度的变化在四个部位中只有一个部位在各组之间存在差异。目前的结果表明，力量和体能训练专业人员可能会认为，水平卧推和斜卧推练习，或这两种练习的组合，在总体力量方面可以产生类似的变化。
