The aim of the current research was the effect of a single session of functional, balance and resistance exercises on the upper cruciate syndrome of elite gymnasts in Arak city. Type and method of research: The current research was a semi-experimental study with a pre-test and post-test research design with a practical purpose along with a control group. The statistical population of the present study was made up of all teenage male gymnasts with upper cruciate syndrome with an age range of 10 to 14 years in the city of Arak, of which 20 were purposefully selected by the G-POWRE software and divided into two groups: ten in the experimental group and ten in the control group. (none in the control group) with a history of more than 3 years, shoulder forward rate greater than 52 degrees and kyphosis greater than 45 degrees and head forward angle greater than 48 degrees were selected as research samples. Findings: The results of the correlated t-test, with a significance level less than 0.05, indicated that a period of functional, balance, and resistance exercises had an effect on the problem of slouching, kyphosis, and forward shoulder among the elite gymnasts of Arak city. Conclusion: According to the results of the present study, functional, balance, and resistance exercises can be used to prevent and correct upper cruciate syndrome in adolescents.