Document Type : Research Paper I Open Access I Released under (CC BY-NC 4.0) license
Authors
1
PhD student in Exercise Physiology, Department of Exercise Physiology, Faculty of Physical Education and Sport Science, University of Tabriz, Tabriz, Iran.
2
Assistant Professor, Department of Exercise Physiology, Faculty of Physical Education and Sport Science, University of Tabriz, Tabriz, Iran
3
Associate Professor, Department of Exercise Physiology, Faculty of Physical Education and Sport Science, University of Tabriz, Tabriz, Iran.
Abstract
Aim: Recently, the use of resistance training with restricted blood flow (BFR) has been recommended as an alternative to heavy resistance training for middle-aged and elderly people. Therefore, the aim of this research was to evaluate the effect of age and status of resistance training on basal levels of anabolic and catabolic hormones in middle-age active male. Methods: In this semi-experimental study design, 20 middle-aged active men (age 47.65±2.53 years) were selected. Subjects were randomly divided into two groups of resistance training with and without BFR. Subjects in the 4-week BFR group performed knee extension and leg press at 20% 1-RM intensity, one 30 repetition set and 2 sets of 15 repetitions, and the non-BFR training group performed the same movements at 80% 1-RM intensity in three sets with 10 repetitions. Blood samples were also taken to measure testosterone and cortisol, growth hormone and insulin-like growth factor-1. Finally, Data were analyzed by analyses of variance and independent T test. The significance level was set at p < 0.05. Results: Resting concentrations of growth hormone, and IGF-I increased significantly after four weeks of resistance training with and without BFR. There was no different between resistance training with and without BFR in growth hormone and IGF-I. However, four weeks of resistance training with and without BFR did not significantly change testosterone and cortisol concentration. Conclusions: Based on the results, it seems likely that the use of resistance training with BFR during middle age is not superior to traditional resistance training in terms of response and adaptation to anabolic hormonal factors, but may be better in terms of implementation.
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