Larsen Stian, Gomo Olav, van den Tillaar Roland
Department of Sports Science and Physical Education, Nord University, Levanger, Norway.
Front Sports Act Living. 2021 Jan 22;2:637066. doi: 10.3389/fspor.2020.637066. eCollection 2020.
Grip width has been found to affect lifting performance, especially around the sticking region; however, little is known about the kinetics and muscle activities that could explain these differences in performance. This study aimed to investigate the effects of grip width on the joint, barbell kinematics, and horizontal kinetics, analyzed in tandem with the effects of muscle activation around the sticking region in the one repetition maximum (1-RM) barbell bench press. Fourteen healthy bench press-trained males (body mass: 87.8 ± 18.4, age: 25 ± 5.4) performed 1-RM with a small, medium, and wide grip width. The participants bench pressed 109.8 ± 24.5 kg, 108.9 ± 26.4 kg, and 103.7 ± 24 kg with the wide, medium, and narrow grip widths. Furthermore, the wide grip width produced 13.1-15.7% lateral forces, while the medium and narrow grip widths produced 0.4-1.8 and 8.5-10.1% medially directed forces of the vertical force produced during the sticking region, respectively. Horizontal forces did not increase during the sticking region, and the resultant forces decreased during the sticking region for all grip widths. The wide and medium grip widths produced greater horizontal shoulder moments than the narrow grip width during the sticking region. Hence, the wide and medium grip widths produced similar shoulder and elbow joint moments and moment arm at the first located lowest barbell velocity. Furthermore, triceps medialis muscle activity was greater for the medium and narrow grip widths than the wide grip width. This study suggests that the sticking region for the wide and medium grip widths may be specific to the horizontal elbow and shoulder joint moments created during this region. Therefore, when the goal is to lift as much as possible during 1-RM bench press attempts among recreationally trained males, our findings suggest that bench pressing with a wide or medium grip width may be beneficial.
研究发现握距会影响举重表现，尤其是在力竭区域附近；然而，对于能够解释这些表现差异的动力学和肌肉活动，人们知之甚少。本研究旨在探讨握距对关节、杠铃运动学和水平动力学的影响，并结合在一次最大重复次数（1-RM）杠铃卧推中力竭区域周围的肌肉激活效应进行分析。14名健康的、有卧推训练经验的男性（体重：87.8±18.4，年龄：25±5.4）分别以窄、中、宽三种握距进行1-RM测试。参与者在宽、中、窄三种握距下的卧推重量分别为109.8±24.5千克、108.9±26.4千克和103.7±24千克。此外，宽握距产生的横向力为13.1%-15.7%，而中握距和窄握距在力竭区域产生的向内力分别为垂直力的0.4%-1.8%和8.5%-10.1%。在力竭区域，水平力并未增加，且所有握距下的合力在力竭区域均有所下降。在力竭区域，宽握距和中握距产生的水平肩部力矩大于窄握距。因此，在杠铃速度首次降至最低时，宽握距和中握距产生的肩部和肘关节力矩以及力臂相似。此外，中握距和窄握距时内侧肱三头肌的肌肉活动比宽握距时更大。本研究表明，宽握距和中握距的力竭区域可能特定于该区域产生的水平肘部和肩部关节力矩。因此，对于有休闲训练经验的男性，当目标是在1-RM卧推尝试中尽可能多地举起重量时，我们的研究结果表明采用宽握距或中握距进行卧推可能是有益的。
