摘要:Aim. In this study, it has been examined whether or not aggressive behaviors of athletes performing varioussport branches are associated with thyroid hormone.Methods. The study group is consisted of 25 male athletes. T3, T4 and TSH values of the athletes have beenexamined and reported by the blood samples taken by the specialists in the related hospitals in order to determinethe thyroid hormone values of the individuals participating in the research.Results. In the analysis of the data, Friedman test and Wilcoxon test which are non-parametric tests are usedby using Spss 20 program.Conclusions. Findings in the study have found that aggression behaviors of athletes are related to thyroidhormone values and there are statistically significant differences.