Matykiewicz Patryk, Krzysztofik Michał, Zając Adam
Institute of Sport Sciences, The Jerzy Kukuczka Academy of Physical Education in Katowice, Katowice, Poland.
J Hum Kinet. 2023 Apr 20;87:201-210. doi: 10.5114/jhk/162516. eCollection 2023 Apr.
The objective of this study was to compare the impact of cambered and standard barbells used during the bench press exercise on the number of performed repetitions and mean velocity during a bench press training session that included 5 sets performed to volitional failure at 70% of one-repetition maximum (1RM) (for each barbell type). An additional objective was to determine whether there would be any difference in neuromuscular fatigue assessed by peak velocity changes during bench press throws performed 1 and 24 hours after the cessation of each session. The research participants included 12 healthy resistance-trained men. Participants performed 5 sets of the bench press exercise to volitional failure against 70% of 1RM with the cambered or standard barbell. The Friedman's test showed an overall trend of a significant decrease in the mean velocity (p < 0.001) and a number of performed repetitions (p < 0.001) from the first to the fifth set (p < 0.006 and p < 0.02, respectively for all) under both conditions, yet neither bar showed significant differences between the corresponding sets. Two-way ANOVA indicated a significant main effect of time (p < 0.001) for peak velocity during the bench press throw. The post-hoc comparisons showed significantly lower peak velocity during the bench press throw one hour after the bench press compared to pre (p = 0.003) and 24-hour post intervention (p = 0.007). Both barbells caused a similar decrease in peak barbell velocity during the bench press throw performed one hour after the bench press training session, with values returning to baseline 24 hours later. This indicates that bench press workouts with either a standard or a cambered barbell present the same training demands.
本研究的目的是比较在卧推训练中使用弧形杠铃和标准杠铃对重复次数和平均速度的影响，该训练包括以一次最大重复量（1RM）的70%进行5组直至力竭（每种杠铃类型均如此）。另一个目的是确定在每次训练结束后1小时和24小时进行的卧推投掷中，通过峰值速度变化评估的神经肌肉疲劳是否存在差异。研究参与者包括12名健康的有阻力训练经验的男性。参与者使用弧形或标准杠铃，以1RM的70%进行5组卧推训练直至力竭。Friedman检验显示，在两种情况下，从第一组到第五组，平均速度（p < 0.001）和重复次数（p < 0.001）总体呈显著下降趋势（所有情况分别为p < 0.006和p < 0.02），但两种杠铃在相应组之间均无显著差异。双向方差分析表明，卧推投掷期间峰值速度存在显著的时间主效应（p < 0.001）。事后比较显示，与训练前（p = 0.003）和训练后24小时（p = 0.007）相比，卧推训练后1小时的卧推投掷峰值速度显著降低。在卧推训练后1小时进行卧推投掷时，两种杠铃导致的杠铃峰值速度下降相似，24小时后数值恢复到基线水平。这表明使用标准杠铃或弧形杠铃进行卧推训练的训练要求相同。
