عنوان

تأثیر دو هفته تمرین تناوبی با و بدون محدودیت جریان خون بر شاخص‌صهای رشدی‮‭۱,LA) - (GH,IGF‬و عملکردی مردان نوجوان فعال,‮‭The effect of two weeks of intermittent training with and without blood flow restriction on growth indices (GH, IGF-۱, LA) and functional indices in active adolescent men‬

Introduction: Training blood flow restricted is likely to have a profound effect on resting levels of growth hormone related factors to physical activity.The purpose of the present study is to determine the effect of two weeks of intermittent training with blood flow restriction and without it on serum levels of growth hormone, IGF-1, Lactate, aerobic intencity and anaerobic power in active adolescent men. Methodology: For this purpose, 24 active male adolescents with mean age of 17 83 height of 171 47 cm, body mass index of 22 46 kg / m2 were selected as the sample and selected by random sampling based on VO2max that is divided into two groups. Alternative training was divided into blood flow restriction and Alternative training without blood flow restriction. The protocol of training in this study with intensity of 60-70 MHR was 400 meters during three sets in the first week and it was changed to 400 meters during four sets in the second week. The time out of these training was 60-80 seconds. The cuff pressure for the thighs was between 140 and 180 mm Hg during the training performance. Blood samples were taken to measure GH, IGF-148 levels after the last training session and lactate immediately after the last training session. Functional indices were measured after sampling the same amount of calories (1 glass of milk, 4 dates, 45 g of cheese, and 2 palms of Sangak bread) after first blood sampling. Two hours after breakfast the test was run to measure the anaerobic power index and 30 minutes after the second shuttle run test to determine the Vo2max of the subjects. Data were analyzed by one-way ANOVA and independent t-test at the significant level of 0.05. Results: The results showed that it was a significant difference between the mean of GH in BFR group with and without BFR which was higher in BFR group (P =0.016). And lactate levels also increased significantly (P >0.00). But two weeks of intermittent trainings with blood flow restriction did not increase IGF-1 and aerobic power, mean anaerobic power and fatigue index in active adolescent men (P =0.05). Whereas, two weeks of intermittent training with blood flow restriction increased the peak anaerobic power of active young men (P =0.001). Conclusion: Accordingly, it is concluded that performing intermittent trainings with BFR probably may be more effective in enhancing adolescents' growth and performance indicators than mere intermittent trainings.