Document Detail


Progressive resistance training without volume increases does not alter arterial stiffness and aortic wave reflection.
MedLine Citation:
PMID:  17895531     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Endurance exercise is efficacious in reducing arterial stiffness. However, the effect of resistance training (RT) on arterial stiffening is controversial. High-intensity, high-volume RT has been shown to increase arterial stiffness in young adults. We tested the hypothesis that an RT protocol consisting of progressively higher intensity without concurrent increases in training volume would not elicit increases in either central or peripheral arterial stiffness or alter aortic pressure wave reflection in young men and women. The RT group (n = 24; 21 +/- 1 years) performed two sets of 8-12 repetitions to volitional fatigue on seven exercise machines on 3 days/week for 12 weeks, whereas the control group (n = 18; 22 +/- 1 years) did not perform RT. Central and peripheral arterial pulse wave velocity (PWV), aortic pressure wave reflection (augmentation index; AIx), brachial flow-mediated dilation (FMD), and plasma levels of nitrate/nitrite (NOx) and norepinephrine (NE) were measured before and after RT. RT increased the one-repetition maximum for the chest press and the leg extension (P < 0.001). RT also increased lean body mass (P < 0.01) and reduced body fat (%; P < 0.01). However, RT did not affect carotid-radial, carotid-femoral, and femoral-distal PWV (8.4 +/- 0.2 vs. 8.0 +/- 0.2 m/sec; 6.5 +/- 0.1 vs. 6.3 +/- 0.2 m/sec; 9.5 +/- 0.3 vs. 9.5 +/- 0.3 m/sec, respectively) or AIx (2.5% +/- 2.3% vs. 4.8% +/- 1.8 %, respectively). Additionally, no changes were observed in brachial FMD, NOx, NE, or blood pressures. These results suggest that an RT protocol consisting of progressively higher intensity without concurrent increases in training volume does not increase central or peripheral arterial stiffness or alter aortic pressure wave characteristics in young subjects.
Authors:
Darren P Casey; Darren T Beck; Randy W Braith
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Experimental biology and medicine (Maywood, N.J.)     Volume:  232     ISSN:  1535-3702     ISO Abbreviation:  Exp. Biol. Med. (Maywood)     Publication Date:  2007 Oct 
Date Detail:
Created Date:  2007-09-26     Completed Date:  2007-11-27     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100973463     Medline TA:  Exp Biol Med (Maywood)     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1228-35     Citation Subset:  IM    
Affiliation:
The Center for Exercise Science, Department of Applied Physiology and Kinesiology, College of Health and Human Performance, University of Florida, Gainesville, Florida 32611, USA. casey.darren@mayo.edu
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MeSH Terms
Descriptor/Qualifier:
Adult
Aorta / physiology*
Arteries / physiology*
Blood Pressure
Elasticity
Exercise*
Female
Humans
Male
Nitrates / blood,  metabolism
Nitric Oxide / blood,  metabolism
Nitrites / blood,  metabolism
Norepinephrine / blood,  metabolism
Weight Lifting*
Chemical
Reg. No./Substance:
0/Nitrates; 0/Nitrites; 10102-43-9/Nitric Oxide; 51-41-2/Norepinephrine

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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