Exercise Physiology
Hafez Eynavi; Aboalhamid habibi; Rouhollah Ranjbar; Mohammad Rami
Abstract
Aim: Resistance exercise is Effective factor that stimulate anabolic and catabolic hormones. The ingestion of sport supplements before resistance exercise can affect the hormonal responses. The purpose of this study was to examine the ingestion of a pre-workout supplement and resistance exercise on hormonal ...
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Aim: Resistance exercise is Effective factor that stimulate anabolic and catabolic hormones. The ingestion of sport supplements before resistance exercise can affect the hormonal responses. The purpose of this study was to examine the ingestion of a pre-workout supplement and resistance exercise on hormonal responses.Methods: In a randomized, double-blind, placebo-controlled, and crossover design, sixteen male physical education students (age: 22.9±1.7yr, weight: 67.8±4.0 kg, and BMI: 23.1±1.7 kgm2/) completed two resistance exercise sessions with one week washout period between each session. Participants consumed supplement or placebo 30 minutes before exercise. The supplement was a single scoop (6.5 g) of the C4 pre-workout (cellucor company), and the placebo was 6.5 g maltodextrin. Blood samples were taken before, immediately post, and after 1 hour pos-exercise to analyze growth hormone, testosterone, cortisol, and blood lactate. For analysis of data were used the repeated-measures ANOVA and Bonferroni tests.Results: The results had shown that there were no significant differences in acute responses of testosterone, cortisol, and blood lactate immediately post and one hour after resistance exercise between placebo and supplement conditions (p>0.05). However, the rise of growth hormone after exercise was higher in supplement condition than placebo condition (p<0.025).Conclusion: According to the results of this study, the C4 supplement has no effective response on reducing lactate accumulation due to resistance exercise and has no consequence on buffering system, but can increase growth levels according to the enhancement of anabolic conditions in the body.
