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

Abstract

Background: The purpose of this study was to investigate the acute effects of commercially available pre-workout supplement on anaerobic performance in resistance trained men.Methods: Twenty-three men underwent three testing sessions administrated in a randomized and double-blind fashion separated by a seven-day break. The participants performed three exercise tests: isokinetic strength test, maximal strength test and Wingate test. Statistical analysis was conducted in R environment. Linear mixed models were estimated via R package lme4.Results: The mean knee peak torque was significantly greater in supplemented group for right and left knee flexors (placebo: 103.17 ± 37.61 Nm, and supplemented group: 131.84 ± 29.31 Nm where p=0.001, and placebo: 103.72 ± 39.35, and supplemented group: 129.38 ± 28.44, where p=0.001; respectively) as well as for right and left knee extensors (placebo: 202.65 ± 58.64 Nm, and supplemented group: 237.22 ± 54.75 Nm where p=0.001, and placebo: 203.27 ± 63.2 Nm versus supplemented group: 229.84 ± 50.8 Nm where p=0.002; respectively).The significant difference was observed in mean anaerobic power between supplemented and placebo group for right and left knee flexors (p=0.002 and p=0.005, respectively) as well as for right and left knee extensors (p=0.001 and p=0.002; respectively).There was also observed that the time to peak torque was significantly greater in supplemented group for right and left knee flexors (p=0.002 for both legs). The significant difference was also observed in mean power between supplemented and placebo group during Wingate test (placebo: 8.49 ± 0.57 W/kg, and supplemented group: 8.66 ± 0.55 W/kg where p=0.038). Moreover the mean 3-RM strength test was significantly greater in supplemented group with p=0.001.Conclusions: The results of the study indicate that the supplement significantly improves upper and lower body strength and power output in resistance trained men.

The Effects of Caffeine and Pre-Workout Multi-Ingredient Performance Supplement on Reactive Agility and Countermovement Jump Height

“…That might be due to the group involvedyoung, recreationally-trained handball male players students but not experienced athletes, for which the range of the results would probably be more stable. It can also be postulated, that the significant difference between PL and MIPS group is due to the synergistic effect of caffeine and other constituents of the pre-workout ingredients (6,19). There is very limited data on the effect of acute MIPS ingestion and its effect on lower limbs power measured by CMJ or vertical jump.…”

Caffeine improves work durability and physical performance in anaerobic exercises among active adults in Tripoli Lebanon

“…Kaczka et al [ 8 ] have demonstrated that supplements including caffeine have a positive effect on anaerobic activities, especially in delaying fatigue and increasing strength. Madden et al [ 9 ] also found that the rating of perceived exertion and physical performance was higher in the group of individuals ingesting caffeine.…”