Document Type : Original Article
Authors
1 Ph.D. Student of Exercise Physiology
2 University of Guilan
Abstract
Background and Aim:There are different types of creatine and each of them can have different effects on people's performance. Creatine hydrochloride, as a new form of creatine, has more absorption and solubility due to the properties of hydrochloride. It seems that greater absorption and solubility can have greater effects on people's performance. Based on this, the aim of the present study was to investigate the effects of creatine hydrochloride supplementation along with resistance training on changes in testosterone and cortisol levels, muscle strength and hypertrophy, and body composition of young men. Materials and Methods:20 eligible young men participated in this study. The subjects were divided into two groups (n=10) resistance training+creatine hydrochloride and resistance training+placebo and performed resistance training and creatine hydrochloride supplementation for 8 weeks. Result:The results of the research showed that creatine hydrochloride combined with resistance training causes a significant increase in the ratio of testosterone to cortisol, muscle strength and hypertrophy, muscle mass and a significant decrease in the percentage of fat and cortisol (P≤0.05). Changes in strength, hypertrophy, muscle mass and fat percentage in the resistance training + creatine hydrochloride group were significant compared to the resistance training+placebo group (P≤0.05). Also, the levels of cortisol and the ratio of testosterone to cortisol in the resistance training + creatine hydrochloride had significant changes compared to the resistance training+placebo group (P<0.001, P=0.002; respectively). Conclusion:The results show the effect of creatine hydrochloride on cortisol levels, the ratio of testosterone to cortisol, strength and hypertrophy, and it seems that this type of creatine can have beneficial effects on performance due to its high solubility without the need for loading. Considering very few studies in this regard, for more accurate conclusions, more studies are needed in athletes of different fields, at different levels of sports and longer supplementation periods.
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