Effect of blood flow restriction deal during isometric exercise on growth hormone and testosterone active males

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