Document Detail


Comparison of low- and high-intensity resistance exercise on lipid peroxidation: role of muscle oxygenation.
MedLine Citation:
PMID:  17313297     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The purpose of this study was to examine the effect of low- vs. high-intensity resistance exercise on lipid peroxidation. In addition, the role of muscle oxygenation on plasma malondialdehyde (MDA) concentrations was explored. Eleven experienced resistance trained male athletes (age: 20.8 +/- 1.3 years; weight: 96.2 +/- 14.4 kg; height: 182.4 +/- 7.3 cm) performed 4 sets of the squat exercise using either a low-intensity, high-volume (LI; 15 repetitions at 60% 1 repetition maximum [1RM]) or high-intensity, low-volume (HI; 4 repetitions at 90% 1RM load). Venous blood samples were obtained before the exercise (PRE), immediately following the exercise (IP), and 20 (20P) and 40 minutes (40P) postexercise. Continuous wave near-infrared spectroscopy was used to measure muscle deoxygenation in the vastus lateralis during exercise. Deoxygenated Hb/Mb change was used to determine reoxygenation rate during recovery. No difference in MDA concentrations was seen between LI and HI at any time. Significant correlations were observed between plasma MDA concentrations at IP and the half-time recovery (T1/2 recovery) of muscle reoxygenation (r = 0.45) and between T1/2 recovery and the area under the curve for MDA concentrations (r = 0.44). Results suggest that increases in MDA occur independently of exercise intensity, but tissue acidosis may have a larger influence on MDA formation.
Authors:
Jay R Hoffman; Joohee Im; Jie Kang; Carl M Maresh; William J Kraemer; Duncan French; Shoko Nioka; Ryotaro Kime; Kenneth W Rundell; Nicholas A Ratamess; Avery D Faigenbaum; Britton Chance
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Journal of strength and conditioning research / National Strength & Conditioning Association     Volume:  21     ISSN:  1064-8011     ISO Abbreviation:  J Strength Cond Res     Publication Date:  2007 Feb 
Date Detail:
Created Date:  2007-02-22     Completed Date:  2007-04-26     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9415084     Medline TA:  J Strength Cond Res     Country:  United States    
Other Details:
Languages:  eng     Pagination:  118-22     Citation Subset:  IM; S    
Affiliation:
College of New Jersey, Ewing 08628, USA. hoffmanj@tcnj.edu
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MeSH Terms
Descriptor/Qualifier:
Adult
Analysis of Variance
Area Under Curve
Exercise / physiology*
Humans
Lactates / blood
Lipid Peroxidation / physiology*
Male
Malondialdehyde / blood
Muscle, Skeletal / metabolism*
Oxygen Consumption / physiology*
Physical Education and Training
Spectroscopy, Near-Infrared
Chemical
Reg. No./Substance:
0/Lactates; 542-78-9/Malondialdehyde

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


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