Document Type : Research Paper

Authors

1 M.Sc. of Exercise Physiology, Shahid Beheshti University of Tehran

2 Professor of Sport Biosciences, Shahid Beheshti University of Tehran

3 Associate Professor of Health and Exercise Rehabilitation, Shahid Beheshti University of Tehran

4 Assistant Professor, Clinical Research Center of Taleghani Hospital of Tehran

5 Ph. D Student of Sports Biochemistry, University of Tehran

Abstract

The purpose of this study was to investigate the effect of the blood flow restriction deal (Kaatsu) during isometric exercise on growth hormone and testosterone in active males. 10 active males (1 to 3 times training per week, age: 23.8±2.32 years, BMI: 24.26±1.80 kg/m2) were participated in this study voluntarily. Subject’s ankle blood pressures were determined by color Doppler ultrasound. Then, subjects performed the study protocol that consisted of six 10-second isometric contractions with 60 seconds rest between each contraction with varying levels of external compression (0% (without compression), 70%, 100%, and 130% of systolic pressure). Blood samples were taken before, immediately after and 15 minute after exercise. Statistical analysis of data did not show significant difference (time × trial) between varying levels of external compression in growth hormone (GH), testosterone (T) and blood lactate (BL). GH, T and BL increased significantly (time) from pre to postexercise in the all varying levels of external compression (p<0.05), and except of T (p=0.074), GH and BL was increased significantly pre to 15 minute after exercise in all varying levels of external compression. On the basis of results, by increasing pressure of blood flow restriction the levels of GH and T increased further but there was no significant difference in the levels of GH and T between varying levels of external compression with the same intensity.

Keywords

Main Subjects

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