Document Detail

Influence of Rest Interval Length on Acute Testosterone and Cortisol Responses to Volume-Load Equated Total Body Hypertrophic and Strength Protocols.
MedLine Citation:
PMID:  22796997     Owner:  NLM     Status:  Publisher    
ABSTRACT: We hypothesized that total body strength (S) and hypertrophic (H) resistance training (RT) protocols utilizing relatively short rest interval (RI) lengths between sets will elicit significant acute increases in total testosterone (TT) and cortisol (C) in healthy young men. 6 men, 26 (±2.4) years, completed 4 randomized RT sessions, following a control session (R). The S and H protocols were equated for volume-load (sets x repetitions x load); S: 8 sets x 3 repetitions at 85% 1-RM, H: 3 sets x 10 repetitions at 70% 1-RM, for all exercises. RI utilized: 60 seconds (S60, H60) and 90 seconds (S90, H90). Blood was drawn pre- (PRE), immediately post- (POST), 15 minutes post- (15 MIN), and 30 minutes post-exercise (30 MIN). H60 elicited significant increases in TT from PRE (7.32±1.85 ng/mL) to POST (8.87±1.83 ng/mL) (p<0.01), 15 MIN (8.58±2.15 ng/mL) (p<0.01), and 30 MIN (8.28±2.16 ng/mL) (p<0.05). H90 also elicited significant increases in TT from PRE (8.37±1.93 ng/mL) to POST (9.90±1.25 ng/mL) (p<0.01) and 15 MIN (9.46±1.27 ng/mL) (p<0.05). S60 elicited significant increases in TT from PRE (7.73±1.88 ng/mL) to 15 MIN (8.35±1.64 ng/mL) (p<0.05), and S90 showed a notable (p<0.10) difference in TT from PRE (7.96±2.29 ng/mL) to POST (8.75±2.45 ng/mL). All protocols did not significantly increase C (p>0.05). Utilizing relatively short RI between RT sets augment the acute TT response to hypertrophic and strength schemes. Shortening RI within high-intensity strength RT may lead to concomitant enhancements in muscle strength and size over a longer period of training.
Matthew G Villanueva; Mike G Villanueva; Christianne Joy Lane; E Todd Schroeder
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-7-12
Journal Detail:
Title:  Journal of strength and conditioning research / National Strength & Conditioning Association     Volume:  -     ISSN:  1533-4287     ISO Abbreviation:  -     Publication Date:  2012 Jul 
Date Detail:
Created Date:  2012-7-16     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9415084     Medline TA:  J Strength Cond Res     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
1University of Southern California, Division of Biokinesiology & Physical Therapy, Clinical Exercise Research Center 2Department of Preventive Medicine, Division of Biostatistics, Los Angeles, CA.
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