运动前多成分补充剂对无氧运动表现的影响：随机双盲交叉研究。
Effects of Pre-Workout Multi-Ingredient Supplement on Anaerobic Performance: Randomized Double-Blind Crossover Study.
机构信息
Department of Sport Nutrition, Academy of Physical Education in Katowice, ul. Mikołowska 72a, 40-065 Katowice, Poland.
Department of Physiology and Biochemistry, University of Physical Education in Krakow, al. Jana Pawła II 78, 31-571 Kraków, Poland.
出版信息
Int J Environ Res Public Health. 2020 Nov 9;17(21):8262. doi: 10.3390/ijerph17218262.
BACKGROUND
The purpose of this research was to investigate the acute effects of a pre-workout supplement on anaerobic performance in resistance-trained men.
METHODS
Twenty-three men underwent three randomized, double-blind testing sessions separated by a seven-day break. The participants performed three tests: isokinetic strength, three repetition maximum (3-RM) strength and Wingate. Statistical analysis was conducted in R environment. Linear mixed models were estimated via R package lme4.
RESULTS
Mean T@0.2 s was significantly greater in supplemented condition for right and left knee flexors (PL: 103.2 ± 37.6 Nm; supplemented condition: 131.8 ± 29.3 Nm ( = 0.001)), and PL: 103.7 ± 39.3; supplemented condition: 129.4 ± 28.4 ( = 0.001)). T@0.2 s for right and left knee extensors (PL: 202.6 ± 58.6 Nm; supplemented condition: 237.2 ± 54.7 Nm ( = 0.001); PL: 203.3 ± 63.2 Nm, supplemented condition: 229.8 ± 50.8 Nm ( = 0.002)). Significant difference was in mean anaerobic power between supplemented and PL condition for right and left knee flexors ( = 0.002, = 0.005) and for right and left knee extensors ( = 0.001 and = 0.002). TTP was significantly shorter in supplemented condition for both sides knee flexors ( = 0.002). There was a significant difference for mean power in the Wingate test (placebo: 8.5 ± 0.6 W/kg; supplemented condition: 8.7 ± 0.5 W/kg ( = 0.038)). Mean 3-RM was significantly greater in supplemented condition ( = 0.001).
CONCLUSIONS
The supplement significantly improves upper and lower body strength and power output in resistance-trained men.
背景
本研究旨在探究一种运动补剂对经过抗阻训练的男性的无氧表现的急性影响。
方法
23 名男性参与者经历了三个随机、双盲测试，每个测试之间间隔 7 天。参与者完成了三个测试：等速力量测试、3 次最大重复力量测试和瓦格纳测试。统计分析在 R 环境中进行。线性混合模型通过 R 包 lme4 进行估计。
结果
右膝和左膝屈肌的 T@0.2 s 在补充组中显著增加（PL：103.2 ± 37.6 Nm；补充组：131.8 ± 29.3 Nm（ = 0.001）），PL：103.7 ± 39.3；补充组：129.4 ± 28.4（ = 0.001））。右膝和左膝伸肌的 T@0.2 s（PL：202.6 ± 58.6 Nm；补充组：237.2 ± 54.7 Nm（ = 0.001）；PL：203.3 ± 63.2 Nm，补充组：229.8 ± 50.8 Nm（ = 0.002））。右膝和左膝屈肌以及右膝和左膝伸肌的补充组和 PL 条件之间的平均无氧功率存在显著差异（ = 0.002， = 0.005）和（ = 0.001 和 = 0.002）。双侧膝关节屈肌的 TTP 在补充组中明显更短（ = 0.002）。瓦格纳测试的平均功率存在显著差异（安慰剂：8.5 ± 0.6 W/kg；补充组：8.7 ± 0.5 W/kg（ = 0.038））。补充组的平均 3-RM 显著增加（ = 0.001）。
结论
该补剂显著提高了经过抗阻训练的男性的上下肢力量和功率输出。
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