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The Effect of Two Weeks of Interval Training with and without Blood Flow Restriction on Growth Indices (GH, IGF-1, LA) in Active Adolescent

Document Type : Review Article

Authors

Tabriz University

10.22089/jehs.2024.15914.1075

Abstract

The purpose of this study was to determine the effect of two weeks of interval training with and without blood flow restriction on the serum levels of growth hormone, IGF-1 and lactate in active adolescent boys.
Materials and Methods
Twenty four active male adolescents (mean age of 17±83 years, height of 171±47 cm) were selected as the sample and randomly divided into two groups of training with (BFR) and without blood flow restriction (WFR). The training protocol was performed with an intensity of 60-75% of MHR, two sessions a week, three repetitions in the first week and four repetitions of 400 meters in the second week. The rest between repetitions was 60-80 seconds. The cuff pressure for thighs during exercise was between 140 and 180 mmHg. Blood samples were taken to measure IGF-1 and GH indices before exercise and 48 hours after the last exercise session and lactate immediately after. Sports activity was taken from the last session. To analyze the data, 2x2 ANOVA statistical test and independent t test were used at a significance level of 0.05.
Results
The findings showed a significant increase in the levels of blood lactate and GH in the BFR group (p = 0.001). However, there was no significant change in the IGF-1 levels for BFR or WFR groups (p = 0.099).
Conclusion
Accordingly, it can be said that performing interval trainings with BFR probably may be more effective in enhancing youths' growth and performance indicators when compare to training without blood flow restriction.

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Journal of Exercise and Health Science
Volume 2, Issue 3
June 2022
Pages 67-80
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