Öz
This study aimed to determine the effect of sports exercises on students' differentiation and perfectionism. The present study was applied in terms of purpose and terms of the method used; it was a quasi-experimental study with a pretest-posttest design with a control group. The statistical population includes; female students of the first year of high school who were studied using peer matching between the ages of 13-15. Due to the quasi-experimental nature of the research through G-Power software, 32 students in the experimental group and 15 students in the control group were studied. Data collection was based on Azimkhani, Hejazi & Aminzadeh’s training protocol (2019), as well as the Perfectionism Questionnaire (Hill, Huelsman, Furr, Kibler, Vicente, & Kennedy, 2004) and the Differentiation Questionnaire (Drake, Murdock, Marszalek, & Barber, 2015). Based on the findings; Can be observed through dependent t-test and analysis of covariance; In the experimental group in the pre-test and post-test in the variable components of differentiation and perfectionism, the significant levels of the dependent t-test are less than 0.05. Therefore, it can be said; significant changes have been made in the variables of differentiation and perfectionism in pre-test and post-test. Conclusion; According to the findings, to increase the psychological and physical factors and the effect of the sports coach, all other factors; Including educational support, the quality of the halls, and educational environments, can be a serious help for students. On the other hand, the type of training along with professional trainers can be a great help for all students, even elite athletes.