Effects of caffeine consumption before resistance exercise on blood levels of testosterone and growth hormones in male athletes

authors:

avatar Rahman Rahimi , * , avatar Maryam Khodamoradi , avatar Fatemeh Falah

Koomesh: Vol.21, issue 4; 679-685
published online: December 02, 2019
article type: Research Article
received: May 02, 2017
accepted: April 02, 2019

how to cite: Rahimi R, Khodamoradi M, Falah F. Effects of caffeine consumption before resistance exercise on blood levels of testosterone and growth hormones in male athletes. koomesh. 2019;21(4):e153132. 

Abstract

Introduction: Caffeine has the athletic performance-enhancing effects, but its effect on concentrations of anabolic hormones is unclear. Therefore, this research examines the short–term effect of caffeine consumption on anabolic hormones of growth (GH) and testosterone (TS) after performing resistance exercise (RE). Materials and Methods: In this randomized double-blind, and placebo-controlled crossover study, 30 volunter men (mean age 21.72 ± 4.06, height 179.31 ± 5.08 centimeter, wight 77.31 ± 14.70 kilogram) who did resistance exercise consumed caffeine supplement (6 mg.k-1 of the body weight) and placebo (maltodextrine 6 mg.k-1 of the body weight) one hour before the RE, and the blood samples were taken before, after and 15 min after RE. Results:  Analysis of data showed that GH concerntration showed a significant difference between the conditions of caffeine and placebo immediately and and 15 minutes after RE (P

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