| Sex differences in substrate oxidation during aerobic exercise in obese men and postmenopausal obese women. | |
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MedLine Citation:
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PMID: 19501865 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The aim of this study was to compare substrate oxidation during aerobic exercise in obese men and postmenopausal obese women. Ten obese men (mean age, 55.4 +/- 2.2 years; body mass index, 27.5 +/- 0.4 kg/m(2); peak oxygen uptake [Vo(2)peak], 44.4 +/- 1.9 mL/kg fat-free mass/min; mean +/- SE] and 10 postmenopausal obese women (mean age, 57.2 +/- 1.2 years; body mass index, 27.9 +/- 0.5 kg/m(2); VO(2)peak, 39.9 +/- 1.3 mL/kg fat-free mass/min) performed a 40-minute bout of cycling exercise at 50% VO(2)peak. Blood samples were collected for assessment of metabolic variables and 17beta-estradiol concentration at baseline and during aerobic exercise. Breath samples were collected to estimate carbohydrate and fat oxidation using a digital computer-based breath-by-breath exercise analysis system during aerobic exercise. Serum 17beta-estradiol concentration was not significantly different between the men and women subjects at baseline (P > .05). Serum free fatty acid concentration tended to be higher in the men than in the women (P = .07) during the exercise, but the respiratory exchange ratio during exercise was lower in women than in men (P < .05). Fat oxidation adjusted for fat-free mass was higher (P < .05) in women than in men. These results suggest that fat utilization was higher during aerobic exercise in postmenopausal obese women than in obese men and did not depend on resting serum 17beta-estradiol concentration. |
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Authors:
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Shigeharu Numao; Yoichi Hayashi; Yasutomi Katayama; Tomoaki Matsuo; Kiyoji Tanaka |
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Publication Detail:
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Type: Clinical Trial; Journal Article; Research Support, Non-U.S. Gov't Date: 2009-06-18 |
Journal Detail:
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Title: Metabolism: clinical and experimental Volume: 58 ISSN: 1532-8600 ISO Abbreviation: Metab. Clin. Exp. Publication Date: 2009 Sep |
Date Detail:
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Created Date: 2009-08-18 Completed Date: 2009-09-02 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0375267 Medline TA: Metabolism Country: United States |
Other Details:
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Languages: eng Pagination: 1312-9 Citation Subset: IM |
Affiliation:
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Faculty of Sport Sciences, Waseda University, Tokorozawa, Saitama 359-1192, Japan. numashige@aoni.waseda.jp |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Epinephrine
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blood Estradiol / blood Exercise / physiology* Female Heart Rate / physiology Humans Male Middle Aged Norepinephrine / blood Obesity / blood, metabolism*, physiopathology Oxidation-Reduction* Postmenopause / metabolism*, physiology Respiratory Function Tests Sex Characteristics* |
| Chemical | |
Reg. No./Substance:
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50-28-2/Estradiol; 51-41-2/Norepinephrine; 51-43-4/Epinephrine |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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