van den Tillaar Roland, Saeterbakken Atle Hole, Andersen Vidar
Department of Sports Science, Nord University, 7601 Levanger, Norway.
Faculty of Education, Arts and Sports, Western Norway University of Applied Sciences, 6851 Sogndal, Norway.
J Funct Morphol Kinesiol. 2022 May 4;7(2):39. doi: 10.3390/jfmk7020039.
The aim of the study was to investigate the acute effects of attaching chains on barbell kinematics and muscle activation in the bench press. Twelve resistance-trained men (height: 1.79 ± 0.05 m, weight: 84.3 ± 13.5 kg, one repetition maximum (1-RM) bench press of 105 ± 17.1 kg) lifted three repetitions of bench press in three conditions: (1) conventional bench press at 85% of 1-RM and bench press with chains that were (2) top-matched and (3) bottom-matched with the resistance from the conventional resistance lift. Barbell kinematics and the muscle activity of eight muscles were measured at different heights during lowering and lifting in the three conditions of the bench press. The main findings were that barbell kinematics were altered using the chains, especially the 85% bottom-matched condition that resulted in lower peak velocities and longer lifting times compared with the conventional 85% condition ( ≤ 0.043). However, muscle activity was mainly only affected during the lowering phase. Based upon the findings, it was concluded that using chains during the bench press alters barbell kinematics, especially when the resistance is matched in the bottom position. Furthermore, muscle activation was only altered during the lowering phase when adding chains to the barbell.
本研究的目的是调查在卧推中附加链条对杠铃运动学和肌肉激活的急性影响。12名有阻力训练经验的男性（身高：1.79±0.05米，体重：84.3±13.5千克，卧推一次重复最大值（1-RM）为105±17.1千克）在三种条件下进行三次卧推重复动作：（1）以1-RM的85%进行传统卧推，以及使用链条的卧推，其中链条（2）在顶部与传统阻力训练的阻力相匹配，（3）在底部与传统阻力训练的阻力相匹配。在卧推的三种条件下，在下降和上升过程中的不同高度测量杠铃运动学和八块肌肉的肌肉活动。主要研究结果是，使用链条会改变杠铃运动学，尤其是85%底部匹配的条件，与传统的85%条件相比，该条件导致峰值速度更低，上升时间更长（≤0.043）。然而，肌肉活动主要仅在下降阶段受到影响。基于这些发现，得出的结论是，在卧推过程中使用链条会改变杠铃运动学，尤其是当阻力在底部位置相匹配时。此外，在杠铃上添加链条时，肌肉激活仅在下降阶段发生改变。
