Beyer Kyle S, Gadsden Max, Patterson-Zuber Patrick, Gonzalez Adam M
Resistance Exercise, Physiology, and Sport Laboratory, Department of Health and Exercise Physiology, Ursinus College, Collegeville, PA, United States.
Department of Allied Health and Kinesiology, Hofstra University, Hempstead, NY, United States.
Front Nutr. 2024 Jan 23;11:1323408. doi: 10.3389/fnut.2024.1323408. eCollection 2024.
Multi-ingredient pre-workout supplements (MIPS) are commonly used by individuals looking to enhance exercise performance and augment adaptations to training. However, the efficacy of commercially available MIPS is largely dependent on the ingredient profile, and new formulations should be investigated to determine their effectiveness. Therefore, the purpose of this study was to examine the effects of a commercially available MIPS product on performance during an upper body resistance exercise protocol.
Twenty resistance-trained participants (10 men, 10 women) volunteered to complete this double-blind, placebo-controlled, crossover study consisting of 3 visits. Visit 1 consisted of body composition, 1-repetition maximum (1RM) testing, and familiarization. Visits 2 and 3 consisted of supplementation with either MIPS or placebo (PLA) 1 h prior to completion of an upper body resistance exercise workout during which power output, repetitions completed, rating of perceived exertion (RPE), and perceived recovery were recorded. Assessments of reaction time, isometric mid-thigh pull, and perceived levels of focus, energy, fatigue, and "muscle pump" were also completed before supplementation, 1 h after supplementation, and immediately after exercise.
Statistical analysis revealed significant main effects of trial for reaction time ( < 0.001) and bench press peak power ( = 0.026) indicating better performance during the MIPS trial. Furthermore, total number of repetitions completed significantly increased ( = 0.003) during the MIPS (96.90 ± 21.31 repetitions) trial compared to PLA (89.50 ± 18.37 repetitions). Additionally, overall session RPE was significantly lower ( = 0.002) during the MIPS (7.6 ± 1.2) trial compared to PLA (8.3 ± 0.9).
These findings suggest that acute supplementation with this MIPS improved upper body resistance exercise performance while reducing participant RPE. Further research should investigate the efficacy of chronic supplementation with this MIPS as the acute response provided an ergogenic benefit.
多成分运动前补充剂（MIPS）常用于希望提高运动表现和增强训练适应性的人群。然而，市售MIPS的功效很大程度上取决于其成分构成，因此需要对新配方进行研究以确定其有效性。因此，本研究的目的是检验一种市售MIPS产品在上半身抗阻运动方案中对运动表现的影响。
20名经过抗阻训练的参与者（10名男性，10名女性）自愿完成这项双盲、安慰剂对照、交叉研究，该研究包括3次访视。第1次访视包括身体成分、1次重复最大值（1RM）测试和熟悉过程。第2次和第3次访视包括在完成上半身抗阻运动锻炼前1小时补充MIPS或安慰剂（PLA），在此期间记录功率输出、完成的重复次数、主观用力感觉（RPE）和主观恢复情况。在补充前、补充后1小时和运动后立即完成对反应时间、等长大腿中部拉力以及注意力、能量、疲劳和“肌肉泵感”的主观水平评估。
统计分析显示，试验对反应时间（<0.001）和卧推峰值功率（=0.026）有显著的主效应，表明在MIPS试验期间表现更好。此外，与PLA（89.50±18.37次重复）相比，在MIPS（96.90±21.31次重复）试验期间完成的重复总数显著增加（=0.003）。此外，与PLA（8.3±0.9）相比，在MIPS（7.6±1.2）试验期间总体训练RPE显著更低（=0.002）。
这些结果表明，急性补充这种MIPS可改善上半身抗阻运动表现，同时降低参与者的RPE。由于急性反应提供了促力益处，进一步的研究应调查长期补充这种MIPS的功效。
