Document Detail


Hormonal responses after a strength endurance resistance exercise protocol in young and elderly males.
MedLine Citation:
PMID:  17024619     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
This study examined testosterone, cortisol and growth hormone responses in elderly and young men after a strength endurance protocol. Eight elderly (age: 69 +/- 5 yrs) and nine young (age: 23 +/- 1 yrs) males with recreational experience in resistance training performed a strength endurance protocol, which included six exercises. At each exercise, the subjects performed 3 sets of 15 reps at 60 % of 1-RM with a 90 s rest interval between sets. The subjects also participated in a control session. Hormonal and blood lactate concentrations were measured before exercise, immediately after exercise and 15 min after the end of exercise. Blood lactate increased (p<0.05) with resistance exercise in both age groups with the highest increases observed in the young males. Testosterone and cortisol concentrations were higher (p<0.05) immediately and 15 min after exercise as compared to the respective control session values in both young and elderly subjects, whereas no differences were observed between groups (p>0.05). Growth hormone concentration increased (p<0.05) after resistance exercise compared to the control session in both age groups. This increase was higher (p<0.05) in the young as compared to the elderly group. The above results show that a moderate intensity - high repetition resistance exercise protocol for the improvement of strength endurance, seems to be a sufficient stimulus that increases testosterone, growth hormone and cortisol concentrations in elderly males. These hormonal responses may create an optimal metabolic environment, which improves muscular function after a strength endurance program although the elderly subjects present an attenuated growth hormone response compared to younger ones.
Authors:
I Smilios; T Pilianidis; M Karamouzis; A Parlavantzas; S P Tokmakidis
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Publication Detail:
Type:  Comparative Study; Journal Article     Date:  2006-10-06
Journal Detail:
Title:  International journal of sports medicine     Volume:  28     ISSN:  0172-4622     ISO Abbreviation:  Int J Sports Med     Publication Date:  2007 May 
Date Detail:
Created Date:  2007-05-14     Completed Date:  2007-06-12     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8008349     Medline TA:  Int J Sports Med     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  401-6     Citation Subset:  IM    
Affiliation:
Department of Physical Education and Sport Science, Democritus University of Thrace, Komotini, Greece.
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MeSH Terms
Descriptor/Qualifier:
Adult
Aged
Exercise Test
Growth Hormone / blood*
Humans
Hydrocortisone / blood*
Lactic Acid / blood
Male
Testosterone / blood*
Weight Lifting / physiology*
Chemical
Reg. No./Substance:
50-21-5/Lactic Acid; 50-23-7/Hydrocortisone; 58-22-0/Testosterone; 9002-72-6/Growth Hormone

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