The Effects of Two Types of Pyramid and Inverted-Pyramid Resistance Trainings on GH and IGF-1 Serums of Active Young Men

摘要

In regard of researches shortage about effects of various types of resistance trainings on growth hormone (GH)and pseudo-insulin growth factor (IGF-1), the purpose of the present study was comparison of the acute andchronic effects of two types of pyramid and inverted-pyramid resistance trainings on levels GH and IGF-1serums, among active young men. For this purpose, twenty men of the research divided to two pyramid andinverted-pyramid training groups, randomly (10 persons for each group). The both training groups participatedin 8 weeks resistance trainings (pyramid and inverted-pyramid). Blood samples were taken from the subjects,before, immediately then, and two hr after the first test (48 hr before the trainings beginning) and the final one(48 hr after the trainings ending). Factor analysis of variance test was used to investigate changes of under studyvariables in both pyramid and inverted-pyramid groups. The results indicated that eight weeks both pyramidand inverted-pyramid trainings would cause increase in GH and IGF-1 serums, among active young men (P was0.000 for both). In the other hand, there was not seen any significant difference about increments of GH andIGF-1 serums, between pyramid and inverted-pyramid types of resistance trainings (P was 0.474 and 0.463,respectively). It seems, resistance trainings create acute and chronic anabolic effects on the bodies of activeyoung males, and these influences do not relate to pyramid or inverted-pyramid type of resistance trainings.However, further surveys with more subjects and measurements of other effective variables are required, forrather accurate conclusions.