title: Acute effect of resistance training volume on hormonal responses in trained men.
abstract: OBJECTIVE
  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.
  
  
  CONCLUSIONS
  The present study confirms that the volume of resistance training can be an important factor in the modulation of acute hormonal responses.
authors.affiliation: Laboratory for Clinical and Experimental Research in Vascular Biology, Physiological Sciences Department, State University of Rio de Janeiro, Rio de Janeiro, Brazil. rdleite@gmail.com
authors.forename: R D
authors.initials: RD
authors.lastname: Leite
authors.forename: J
authors.initials: J
authors.lastname: Prestes
authors.forename: C
authors.initials: C
authors.lastname: Rosa
authors.forename: B F
authors.initials: BF
authors.lastname: De Salles
authors.forename: A
authors.initials: A
authors.lastname: Maior
authors.forename: H
authors.initials: H
authors.lastname: Miranda
authors.forename: R
authors.initials: R
authors.lastname: Simão
mesh_terms: D000328:Adult; D013006:Growth Hormone / Q000097:blood*; D006801:Humans; D006854:Hydrocortisone / Q000097:blood*; D008297:Male; D055070:Resistance Training / Q000379:methods*; D013739:Testosterone / Q000097:blood*
chemical_list: D013739:Testosterone; D013006:Growth Hormone; D006854:Hydrocortisone