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THE JOURNAL OF SPORTS MEDICINE AND PHYSICAL FITNESS
Rivista di Medicina, Traumatologia e Psicologia dello Sport
Indexed/Abstracted in: Chemical Abstracts, CINAHL, Current Contents/Clinical Medicine, EMBASE, PubMed/MEDLINE, Science Citation Index Expanded (SciSearch), Scopus
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ORIGINAL ARTICLES OTHER AREAS
(Biochemistry, Immunology, Kinanthropometry, Neurology, Neurophysiology, Ophtalmology, Pharmacology, Phlebology, etc.)
The Journal of Sports Medicine and Physical Fitness 2011 Giugno;51(2):322-8
Acute effect of resistance training volume on hormonal responses in trained men
Leite R. D. 1,2, Prestes J. 3, Rosa C. 2, De Salles B. F. 2, Maior A. 2, Miranda H. 2, Simão R. 2 ✉
1 Laboratory for Clinical and , Experimental Research in Vascular Biology, Physiological Sciences Department State University of Rio de Janeiro, Rio de Janeiro, Brazil;
2 School of Physical Education and Sports, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil;
3 Graduate Program on Physical Education and Health, Catholic University of Brasilia, Brasilia, Brazil
AIM:The purpose of this study was to investigate the acute hormonal response to resistance training sessions with different volumes in men.
METHODS:Ten recreationally trained men (24.5±7.6 years; 76.2±9.2 kg; 175.6±1.5 cm; 24.5±5.5 kg/m-2) participated in the study. All subjects completed two experimental protocols with different volumes. The first protocol consisted of 3 sets at 80% of 6 RM and the second protocol was 3 sets at 80% of 12 RM with 2 minutes rest between sets and exercises, separated by seven days between them. The exercise order used was: barbell bench press, leg press, machine front lat-pull down, leg curl, shoulder abduction and leg extension. The blood variables analyzed were: testosterone, growth hormone (GH), cortisol and testosterone/cortisol ratio (T:C) before (Pre) and immediately after (Post) each exercise session.
RESULTS: The intra-groups comparison for testosterone and hGH revealed a significant increase in 80%-6RM and 80%-12RM. Cortisol levels was significantly higher in 80%-12RM and T:C ratio in 80% 6 RM when compared Pre and Post values. Inter-groups comparison showed higher hGH and cortisol levels and lower T:C ratio for 80% 12 RM. There was no statistically significant different between 80%-6RM and 80%-12RM for testosterone.
CONCLUSION:The present study confirms that the volume of resistance training can be an important factor in the modulation of acute hormonal responses.