Document Type : Original Article
Authors
1 Ph.D. in Exercise Physiology, Hakim Sabzevari University; Assistant Professor in Exercise Physiology, Gonbad Kavoos Branch, Islamic Azad University, Gonbad kavoos, Iran.
2 Professor of Exercise Physiology Department, Faculty of Sports Sciences. Ferdowsi University of Mashhad, Mashhad, Iran.
3 Professor of Exercise Physiology Department, Faculty of Sports Sciences, Hakim Sabzevari University, Sabzevar, Iran.
Abstract
Background and Purpose: Resistance exercises with new methods such as blood flow restriction (BFR) that are performed with lower intensities compared to traditional resistance exercises, it can have more favorable effects on muscle strength and size. Therefore, the aim of the present study was to investigate the study adaptability of testosterone and growth hormones in response to eight weeks of eccentric resistance training with and without blood flow restriction.
Method: In this study, 40 soccer players participated in a semi-experimental research design. Subjects in the present study were randomly divided into four groups: eccentric resistance training with BFR (n=10), eccentric resistance training without BFR (n=10), traditional resistance training (n=10) and control (n=10). To assess the strength of the upper body muscles and leg muscle strength were used from bench press and leg press tests, also, before and after an eight-week training period, blood samples were taken to determine the concentration of testosterone and growth hormones. A one-way repeated-measures and Bonferroni post hoc test was used to compare the groups (P≥0.05).
Results: The results of the study showed that none of the training programs had a meaningful effect on serum testosterone level (P= 0.27), and growth hormones (P= 0.88).
Conclusion: In general, it can be said that there was no significant difference among the three training methods in improving the effects of resistance training. Therefore, despite the fact that eight weeks of eccentric training didn't affect the compatibility of testosterone and growth hormones, it probably caused favorable changes in the strength of male football players.
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