Muscle fiber type I influences lipid oxidation during low-intensity exercise in moderately active middle-aged men

The simultaneous effects of body composition, cardiorespiratory fitness, physical activity, and muscle fiber characteristics on lipid oxidation at basal state and during exercise were studied in a population‐based group (n=70) of middle‐aged men. Body composition, oxygen uptake, and lipid oxidation...

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Published in:Scandinavian journal of medicine & science in sports 2006-04, Vol.16 (2), p.134-140
Main Authors: Turpeinen, J.-P., Leppävuori, J., Heinonen, O. J., Kaila, K., Salo, J., Lilja, M., Kesäniemi, Y.A.
Format: Article
Language:English
Subjects:
Analysis of Variance
Basal Metabolism
Biopsy
Body Composition
Calorimetry, Indirect
energy expenditure
Exercise - physiology
Exercise Test
Humans
Lipid Metabolism - physiology
Male
Middle Aged
Muscle Fibers, Slow-Twitch - physiology
normoglycemic
Oxidation-Reduction
Oxygen Consumption - physiology
Physical Fitness - physiology
population-based
Regression Analysis
resting metabolic rate
Surveys and Questionnaires
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Summary:The simultaneous effects of body composition, cardiorespiratory fitness, physical activity, and muscle fiber characteristics on lipid oxidation at basal state and during exercise were studied in a population‐based group (n=70) of middle‐aged men. Body composition, oxygen uptake, and lipid oxidation were determined in a volitional maximal exercise test, physical activity with a questionnaire, muscle fiber characteristics with muscle biopsy, and resting metabolic rate and lipid oxidation at basal state with indirect calorimetry. In regression analysis, type I muscle fibers contributed significantly to lipid oxidation at basal state (r=0.30, r2=0.07, P
ISSN:0905-7188
1600-0838
DOI:10.1111/j.1600-0838.2004.00436.x