| Effects of heavy resistance/power training on maximal strength, muscle morphology, and hormonal response patterns in 60-75-year-old men and women. | |
| | |
MedLine Citation:
|
PMID: 12180315 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
Eleven women (TRW; 64 +/- 4 yrs) and ten men (TRM; 65 +/- 5 yrs) participated in the strength/power training twice a week for 24 weeks. Basal concentrations of serum total and free testosterone, growth hormone (GH), dehydroepiandrosterone sulfate (DHEAS), cortisol and sex hormone binding globulin (SHBG) as well as acute responses of serum total and free testosterone, growth hormone (GH) were measured. Maximal 1RM strength in the squat, chair rise time and muscle fibre distribution and areas of type I and IIa and IIb of the vastus lateralis were also examined. 1RM squat increased in TRW by 26 (SD10)% (p < .001), and in TRM by 35 (7)% (p < .001) and chair rise time improved in both groups (p < .001). Fibre areas increased in type I, (p < .01), IIa (p < .01) and IIb (p < .01) in TRM and type I (p < .05) and IIa (p < .05) in TRW. The proportion of type IIa increased from 31% to 43% (p < .05) in TRW and that of type IIb decreased from 27% to 17% (p < .05) in TRW and from 25% to 17% (p < .05) in TRM. Individual concentrations of testosterone/cortisol ratios correlated (r = 0.63; p < .05) with the individual increases in 1RM strength in TRW. The exercise sessions resulted in acute increases in serum GH in both groups (p < .05) with a further increase (p < .01) up to 10 minutes post-loading in TRM at post-training. |
| | |
Authors:
|
Keijo Häkkinen; William J Kraemer; Arto Pakarinen; Travis Triplett-McBride; Jeffrey M McBride; Arja Häkkinen; Markku Alen; Michael R McGuigan; Roger Bronks; Robert U Newton |
Related Documents
:
|
8995035 - Does renal osteodystrophy develop and/or progress during the course of rhgh treatment? 18673465 - Cranially irradiated adult cancer survivors may have normal spontaneous gh secretion in... 8299565 - Efficacy and specificity of l-692,429, a novel nonpeptidyl growth hormone secretagogue,... 11684875 - Short-term tools to measure responsiveness to growth hormone replacement. 8586475 - Plasma levels of endothelin-1 at rest and after exercise in patients with moderate cong... 15855625 - Alterations in follicular dynamics and steroidogenic abilities induced by heat stress d... |
Publication Detail:
|
Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
|
Title: Canadian journal of applied physiology = Revue canadienne de physiologie appliquée Volume: 27 ISSN: 1066-7814 ISO Abbreviation: Can J Appl Physiol Publication Date: 2002 Jun |
Date Detail:
|
Created Date: 2002-08-15 Completed Date: 2002-12-13 Revised Date: 2008-11-21 |
Medline Journal Info:
|
Nlm Unique ID: 9306274 Medline TA: Can J Appl Physiol Country: United States |
Other Details:
|
Languages: eng Pagination: 213-31 Citation Subset: IM |
Affiliation:
|
Department of Biology of Physical Activity and Neuromuscular Research Center, University of Jyväskylä, Finalnd. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Aged Exercise / physiology* Female Gonadal Steroid Hormones / blood Growth Hormone / blood Hormones / blood* Humans Hypertrophy Male Middle Aged Muscle Fibers, Skeletal Muscle, Skeletal / pathology, physiology* |
| Chemical | |
Reg. No./Substance:
|
0/Gonadal Steroid Hormones; 0/Hormones; 9002-72-6/Growth Hormone |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Topiramate versus bupropion SR when added to mood stabilizer therapy for the depressive phase of bip...
Next Document: The lactate minimum test for cycling: estimation of the maximal lactate steady state.