The aim of this research is to examine the effects of physical activity levels on the development of sporting and fairplay characteristics of students participating in school competitions in different sports branches. In the study, 135 students who participated in school sports from 4 branches (Basketball, Football, Volleyball, Badminton) from the schools determined according to the appropriate method in Sivas city center (4 different secondary schools) and the Multidimension Behavior Scale in Sport adapted to Turkish by Balcikanli (2010) were applied. The Cronbach Alpha value of the scale is .88 and the scale consists of 20 items. In addition to this, the Children's Physical Activity Scale (CPAS) was adapted to Turkish by Tanir (2003) was applied to the students. The Cronbach Alpha value of the scale is .76 and the scale consists of 9 questions. SPSS (22 ver.) Package program was used for the analysis of the obtained data. Since the parametric test assumptions were fulfilled (Shapiro-Wilk); T test, Variance Analysis, Tukey test were used for the difference between the two means in the independent groups and the significant level was taken as .05. When the physical activity and behavior scores in sport of the male and female students in the study were compared, the difference was significant (p <0.05). Differences were found to be significant when comparing schools in terms of Physical Activity Scale (p<0.05). When the schools were compared according to the Behavior Scale in Sport, the difference was not significant (p>0.05). When the physical activity and behavior scores of the students were compared according to the selected branches, the difference was found significant (p<0.05). Today, the rapid advancement of technology facilitates our everyday life from one side, while the other is lazing individuals. Children and young people are most affected by immobility. It should not be forgotten that simple activities such as our children choosing bicycles instead of motor vehicles, using stairs instead of elevators, will benefit from opportunities for physical activity. As a result from this study, Physical activity scores are higher in male students than female students, while fair play scores are higher in female students than male students.