University of Tehran Journal of Sport Biosciences 2008-9325 12 2 2020 08 22 A Comparison of the Responses of Testosterone, Cortisol and Creatine Kinase to Two Types of Resistance Training with and without Blood Flow Restriction in Gymnast Boys A Comparison of the Responses of Testosterone, Cortisol and Creatine Kinase to Two Types of Resistance Training with and without Blood Flow Restriction in Gymnast Boys 127 142 77964 10.22059/jsb.2020.219978.1124 FA Ali Akbarnejad Associate Professor, Faculty of Physical Education and Sport Sciences, University of Tehran, Tehran, Iran Sirous Choobineh Associate Professor, Faculty of Physical Education and Sport Sciences, University of Tehran, Tehran, Iran Morteza Yari . MSc of Physical Education, Faculty of Physical Education and Sport Sciences, University of Tehran, Tehran, Iran Ali Rajabi Ph.D. of Exercise Physiology, Faculty of Educational Sciences and Psychology, Mohaghegh Ardabili University, Ardabil, Iran Journal Article 2016 12 04 The aim of this study was to compare the responses of testosterone, cortisol and creatine kinase to two types of resistance training with and without blood flow restriction. For this purpose, 36 gymnast boys aged between 10 and 14 participated in a quasi-experimental research. The subjects (mean weight 37.11 ± 8.11 kg, height 145.16 ± 11.58 cm, body mass index 17.40 ± 1.77 kg/m²) were randomly divided into three groups: control (n=12), traditional resistance training (n=12), and resistance training with blood flow restriction (n=12). Training protocol included three movements: leg extension, elbow flexion and bench press. Blood samples were collected before and half an hour after the training. Dependent t test was used to check the intragroup results and one-way ANOVA and LSD post hoc test were used to evaluate the intergroup results. The intragroup results showed that testosterone variable was not significant in traditional resistance training (P=0.653) and resistance training with blood flow restriction (P=0.107) groups after a bout of training. But cortisol variable significantly increased in both traditional resistance training (P=0.015) and resistance training with blood flow restriction (P=0.015) groups. Also, creatine kinase was significant only in traditional resistance training group (P=0.001). The intergroup results showed that no significant differences in testosterone and cortisol of both types of training between the groups but the difference was significant in creatine kinase (P=0.05). Equal anabolic response in two types of resistance training in this study and less damage index in blood flow restriction group supported the advantage of this type of resistance training to some extent. The aim of this study was to compare the responses of testosterone, cortisol and creatine kinase to two types of resistance training with and without blood flow restriction. For this purpose, 36 gymnast boys aged between 10 and 14 participated in a quasi-experimental research. The subjects (mean weight 37.11 ± 8.11 kg, height 145.16 ± 11.58 cm, body mass index 17.40 ± 1.77 kg/m²) were randomly divided into three groups: control (n=12), traditional resistance training (n=12), and resistance training with blood flow restriction (n=12). Training protocol included three movements: leg extension, elbow flexion and bench press. Blood samples were collected before and half an hour after the training. Dependent t test was used to check the intragroup results and one-way ANOVA and LSD post hoc test were used to evaluate the intergroup results. The intragroup results showed that testosterone variable was not significant in traditional resistance training (P=0.653) and resistance training with blood flow restriction (P=0.107) groups after a bout of training. But cortisol variable significantly increased in both traditional resistance training (P=0.015) and resistance training with blood flow restriction (P=0.015) groups. Also, creatine kinase was significant only in traditional resistance training group (P=0.001). The intergroup results showed that no significant differences in testosterone and cortisol of both types of training between the groups but the difference was significant in creatine kinase (P=0.05). Equal anabolic response in two types of resistance training in this study and less damage index in blood flow restriction group supported the advantage of this type of resistance training to some extent. https://jsb.ut.ac.ir/article_77964_4fd6242bded020669b4357fa2440e061.pdf