The aim of this study is to examine the acute effects of thoracic manipulation on trunk flexion and balance characteristics in athletes. 60 male team athletes with a mean age of 22.60±0.32 years participated in the study voluntarily. Trunk flexion values and balance levels of all participants were determined before manipulation. After the measurements, the participants were randomly divided into two groups as the thoracic manipulation group (TMG) and the placebo manipulation group (PMG). Then, as a single session, thoracic manipulation was applied to the TMG group and placebo thoracic manipulation was applied to the PMG group. The trunk flexions and balance levels of each participant were remeasured after the application, and the differences before and after the application were examined. Since the data analyzed via SPSS 25.0 package program showed normal distribution, paired-t test was used to evaluate the pre-application and post-application results. The results were analyzed at the p