The main purpose of this study was to investigate the effect of relative strength training with blood flow restriction (BFR) on Blood Lactate and Growth Hormone .This study used experimental method by semi- experimental design. Thirteen sports science female students (18.7±1year) volunteered to participate in the study. They were purposely chosen and randomly assigned to two groups to participate in an exercises: experiment group (used elastic band for BFR) during training and control group. Both groups participated in relative strength exercises for a period of (1) week, (3) training sessions. The training period was 20 minutes. The training program for both groups consisted of exercises for arms and thighs using body weight, only (BFR) group has elastic bands on the upper part of the limb used during the exercise. Measurements included: Blood Lactate (BL), Growth Hormone (GH). The results showed rapid  increased in BL, GH for BFR group (p˂0.05). The results indicate the effectiveness of the exercise program in BFR group. However, the difference between the two groups was not apparent. It is recommended to repeat same procedures and variables using two groups with higher number of subjects in each group.