Cited by 59Cardiovascular and exercise physiologyMuscle metabolism and nutritionAdipose Tissue and Metabolism

Exercise increases fat oxidation at rest unrelated to changes in energy balance or lipolysis.

Calles-Escandon, J., Goran, M. I., O'Connell, M., Nair, K. S., Danforth, E.·1996·American Journal of Physiology-Endocrinology and Metabolism

Abstract

The hypothesis that exercise increases fat oxidation at rest independently of changes in energy balance, body composition, and/or lipolysis was tested in 21 volunteers. After a period of energy balance, volunteers were randomly allocated to one of four groups: control, overfed (OF), overfed and exercised (OF-EX), and exercised (EX). OF and OF-EX were overfed 50% excess of energy balance calories; OF-EX and EX spent 50% excess of energy balance calories during daily exercise sessions. Exercise increased fat oxidation at rest independently of dietary intake (OF-EX = + 22 +/- 2.4, EX = + 23 +/- 1.5 mg/min) and reduced carbohydrate oxidation (OF-EX = - 49 +/- 6.2, EX = - 46 +/- 5.4 mg/min). Volunteers in the OF group had an increase in carbohydrate oxidation (85 +/- 5.9 mg/min) and a decline in fat oxidation (- 33 +/- 1.4 mg/min). Protein oxidation did not change in any group. These changes occurred without a direct relation with changes in lipolysis and persisted even when expressed as a percentage or as an absolute equivalent of resting metabolic rate in calories. Thus exercise, independent of changes in energy intake and body composition and not related to changes in lipolysis, increases fat oxidation at rest, which may explain the beneficial effects of exercise in weight loss programs.

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Crossref · 10.1152/ajpendo.1996.270.6.e1009

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Authors
Calles-Escandon, J., Goran, M. I., O'Connell, M., Nair, K. S., & Danforth, E.
Affiliations
  • Department of Medicine, University of Vermont, Burlington 05405,USA.
  • University of Vermont (US)
Venue
American Journal of Physiology-Endocrinology and Metabolism
Published
1996-06-01
Volume
270
Issue
6
Pages
E1009-E1014
ISSN
  • 0193-1849 (ISSN-L)
  • 1522-1555
OpenAlex
W2260778778
Cited by
59
References
35
Citations by year
2024: 3 · 2023: 3 · 2022: 1 · 2021: 1 · 2020: 4 · 2019: 2 · 2018: 2 · 2017: 1 · 2015: 2 · 2013: 1 · 2012: 2
FWCI
6.29
Type
journal article
Language
en
Open access
closed
Locations
  • American Journal of Physiology-Endocrinology and Metabolism (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (5r01dk018535-12)
  • U.S. Public Health Service (K08 01963)
  • National Institute of Diabetes and Digestive and Kidney Diseases (R01-DK-18535, R01-DK-401973)
Topics
  • Health Sciences › Medicine › Complementary and alternative medicine › Cardiovascular and exercise physiology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Muscle metabolism and nutrition
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
Keywords
physical activity, fat oxidation, resting metabolic rate, energy balance, lipolysis, carbohydrate oxidation, protein oxidation, overfeeding, weight loss, substrate oxidation
MeSH terms
Adult, Body Composition, Energy Intake, Diet, Energy Metabolism, Fatty Acids, Nonesterified, Humans, Lipolysis, Oxidation-Reduction, Rest, Exercise, Carbohydrate Metabolism

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