The aim of this study was to investigate the effects of eight weeks exercise program on some hematological parameters in obese and overweight children. A total of 44 boys aged 14-16 were included in the study. The obese group was divided into two groups as 22, and overweight group 22. Body mass index (BMI) values were used to determine obesity in the formation of groups. The children who participated in the study were selected activities according to the branches which lasted 60 minutes in 3 days a week for 3 weeks and the walking program was increased. Blood samples taken at rest and at the end of the study; WBC (leukocyte), RBC (erythrocyte), hemoglobin (HGB), hematocrit (HCT), platelet (PLT), mean platelet volume (MPV) and platelet distribution width (PDW) levels were analyzed. SPSS 22.0 statistical program (SPSS Inc., Chicago, Illinois, USA) was used for the statistical analysis of the data. Independent Samples T test for comparison of binary groups; Paired Samples T tests were used to analyze the difference between pre-test and post-test groups. At the end of the exercise, statistically significant differences were found in body weight, MCV, MPV and PDW values between the pre-test and post-test of the measured values of obese subjects (p <0.05). The body weight, BMI, RBC, HGB, HCT, MPV and PDW values of the overweight group were statistically significant (p<0.05). There was no significant difference between the groups in obese and overweight groups (p>0.05). As a result, it can be said that the obese and overweight group caused changes in hematological parameters and the overweight group was more likely to be affected by the exercise than the obese group. Article visualizations
