| Fat oxidation rate during and after a low- or high-intensity exercise in severely obese Caucasian adolescents. | |
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MedLine Citation:
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PMID: 19820961 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The objective is to study the effects of low-intensity (LI) or high-intensity (HI) equicaloric exercises on energy expenditure (EE) and substrate oxidation rate during and after the exercises in severely obese Caucasian adolescents. Twenty obese boys (BMI-SDS 3.04 +/- 0.52, %Fat Mass 38.2 +/- 2.1%) aged 14-16 years (pubertal stage >3) participated in this study. Maximal oxygen uptake (V'O(2max)) and maximal fat oxidation rate were determined with indirect calorimetry using a graded exercise test on a treadmill. EE and substrate oxidation rate during equicaloric low-intensity (LI, 42% V'O(2max) for 45 min) and high-intensity (HI, 67% V'O(2max) for 30 min) exercises on a treadmill and during post-exercise recovery period (60 min) were determined with indirect calorimetry. Maximal fat oxidation rate was observed at 42 +/- 6% V'O(2max) (62 +/- 5% HR(max)) and fat oxidation rate was 0.45 +/- 0.07 g/min. The total amounts of EE, during the LI and HI exercises, and the post-exercise recovery periods were not significantly different (1,884 +/- 250 vs. 1,973 +/- 201 kJ, p = 0.453), but the total amount of fat oxidised was significantly higher (+9.9 g, +55.7%, p < 0.001) during the LI exercise than during the HI exercise. However, fat oxidation rates during the post-exercise recovery periods were not significantly different following LI and HI exercises. Total fat oxidised was significantly higher during the LI than during the HI exercise in obese adolescents. However, the equicaloric exercise intensity did not influence EE, fat and carbohydrate oxidation rate during the recovery period. |
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Authors:
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Stefano Lazzer; Claudio Lafortuna; Carlo Busti; Raffaela Galli; Tiziana Tinozzi; Fiorenza Agosti; Alessandro Sartorio |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2009-10-10 |
Journal Detail:
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Title: European journal of applied physiology Volume: 108 ISSN: 1439-6327 ISO Abbreviation: Eur. J. Appl. Physiol. Publication Date: 2010 Jan |
Date Detail:
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Created Date: 2010-01-21 Completed Date: 2010-06-14 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100954790 Medline TA: Eur J Appl Physiol Country: Germany |
Other Details:
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Languages: eng Pagination: 383-91 Citation Subset: IM |
Affiliation:
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Istituto Auxologico Italiano, IRCCS, Laboratorio Sperimentale di Ricerche Auxo-Endocrinologiche, via Ariosto 13, 20145, Milan, Italy. stefano.lazzer@uniud.it |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adolescent Body Mass Index Energy Metabolism European Continental Ancestry Group Exercise / physiology* Exercise Test Humans Lipid Metabolism / physiology Male Obesity / ethnology, metabolism* Oxidation-Reduction Oxygen Consumption / physiology* |
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