Effects of Pre-Workout Multi-Ingredient Supplement on Anaerobic Performance: Randomized Double-Blind Crossover Study

• Published in: International journal of environmental research and public health 2020-11, Vol.17 (21), p.8262
• Main Authors: Kaczka, Piotr, Batra, Amit, Kubicka, Katarzyna, Maciejczyk, Marcin, Rzeszutko-Bełzowska, Agata, Pezdan-Śliż, Iwona, Michałowska-Sawczyn, Monika, Przydział, Marta, Płonka, Artur, Cięszczyk, Paweł, Humińska-Lisowska, Kinga, Zając, Tomasz
• Format: Article
• Language: English
• Subjects: Acute effects; Anaerobic conditions; Anaerobiosis; Athletic Performance; Caffeine; Cross-Over Studies; Dietary Supplements; Double-Blind Method; Double-blind studies; Energy drinks; Exercise; Flexors; Humans; Ingredients; Isokinetic strength; Knee; Laboratories; Male; Metabolism; Muscle Strength; Nervous system; Physical education; Physical fitness; Physiology; Sports Nutritional Physiological Phenomena; Statistical analysis
• ISSN: 1660-4601; 1661-7827; 1660-4601
• DOI: 10.3390/ijerph17218262

The purpose of this research was to investigate the acute effects of a pre-workout supplement on anaerobic performance in resistance-trained men. 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. 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). The supplement significantly improves upper and lower body strength and power output in resistance-trained men.