[Function of growth hormone in the human energy continuum during physical exertion]

A study has been carried out in 18 healthy sedentary males (controls) and 15 trained handball players. It was programmed two different tests on cycle-ergometer: Test 1 aerobic of progressive increments of load (1 W/kg/3 min) and Test 2 (A) anaerobic (4 W/kg, during 1.5 min) and after resting 10 min., Test 2 (B) till exhaustion. The blood samples were 10 ml each collected by antecubital vein catheterization. Before, during and post-exercise recovery period HG hormone, glycemia, lactate, and FFA were measured. It was found a correlation between HGH levels and substances of the energetic metabolism. The only exception was trained subjects test-2 possibly due to slower response of HGH. However FFA variation levels are correlated at the beginning with the increasing levels (p less than 0.001). It is concluded that HGH can play an important role on the turn-over to get fuel to contractile process from carbohydrates to free fatty acids.