The purpose of this study was to determine the effect of two different intensities

of physical activity on circulating endothelial progenitor cells (EPC) in healthy

young women. For this purpose, 15 female students from volunteers were

randomly selected via questionnaire (group 1: mean age 22 ±1/8 years, BMI

20/81±1/91 kg/m2, n = 8. group 2: mean age 21 ±1/5 years, BMI 20/38 ± 1/66

kg/m2, n = 7). Each group ran 30 minutes at their particular (group 1: ٧0%

HRmax & group 2: ٨5% HRmax) activity on treadmill. Blood samples were

taken from all subjects for measurement of circulating endothelial progenitor

cells CD34+ and same Isotype control, white blood cells and platelets before

and10minutes after the test. The related T-test (paired) were used for

comparisons within a group , to compare variables between groups were used

one way of variance analysis (ANOVA) for determining the relationship between

variables were used Pearson correlation coefficient. Statistical significance was

accepted as a P value of <0.05. Results of this study showed that both

intensities of physical activity increased significantly the number of EPC, WBC

and Plt, this affects was higher in intensity 85% HRmax, but was not statistically

significant. Just was observed significant association between EPC and platelet.

In summary, can be expressed that physical activity with intensity 70% and 85%

HRmax can increase re-enthotelialisation due to mobilization of EPC, and with

attention to significant association between EPC and platelet these cell

mobilization may serve as a physiologic repair or compensation mechanism in

acute inflammatory injury.