The acute and chronic effects of continuous and intermittent resistance trainings on levels of GH and IGF-1 serums in active young men

Abstract

The aim of the present research was determination of acute and chronic effects of continuous and intermittent resistance trainings on levels of GH and IGF-1, in active young males. For this purpose, twenty-one men were randomly divided to three continuous training, intermittent training and control groups. Two experimental groups participated in eight weeks progressive resistance trainings. Blood samples were taken from the subjects, before, immediately then and 2 hrs after first test (48 hrs before the trainings beginning) and final one (48 hrs after the trainings ending). Control group gave blood samples, only at the beginning and ending of the 8 weeks period. In order to investigate variations of under study variables in both continuous and intermittent groups, variance analysis test with repeated measurements, was used. Considering the presence of the control group and at stage of before activity, independent one-way analysis of variance was implemented, to compare between continuous and intermittent training groups. And, independent T test was applied, at steps of immediately then and 2 hrs after activity, for that comparison. Also, T paired test was utilized, to confide nonbeing change of under study variables, in the control group. Results indicated that the eight weeks both continuous and intermittent trainings would cause increase in GH and IGF-1 serums of active young men. In the other hand, there wasn’t observed any difference between continuous and intermittent resistance trainings, about increments of GH and IGF-1 serums. It seems resistance trainings would generate acute and chronic anabolic influences in bodies of active young males, and these effects don’t have any relation to the type of resistance trainings (whether continuous or intermittent). However, in order to achieve an accurate conclusion, further investigations with more subjects and measurement of other effective variants are required.