The DOI matches its Crossref record; 42 of the 42 references it cites were found in a registry or an index.
Endurance training in obese humans improves glucose tolerance and mitochondrial fatty acid oxidation and alters muscle lipid content
Open accessAbstract
Muscle fatty acid (FA) metabolism is impaired in obesity and insulin resistance, reflected by reduced rates of FA oxidation and accumulation of lipids. It has been suggested that interventions that increase FA oxidation may enhance insulin action by reducing these lipid pools. Here, we examined the effect of endurance training on rates of mitochondrial FA oxidation, the activity of carnitine palmitoyltransferase I (CPT I), and the lipid content in muscle of obese individuals and related these to measures of glucose tolerance. Nine obese subjects completed 8 wk of moderate-intensity endurance training, and muscle biopsies were obtained before and after training. Training significantly improved glucose tolerance, with a reduction in the area under the curve for glucose ( P < 0.05) and insulin ( P = 0.01) during an oral glucose tolerance test. CPT I activity increased 250% ( P = 0.001) with training and became less sensitive to inhibition by malonyl-CoA. This was associated with an increase in mitochondrial FA oxidation (+120%, P < 0.001). Training had no effect on muscle triacylglycerol content; however, there was a trend for training to reduce both the total diacylglcyerol (DAG) content (−15%, P = 0.06) and the saturated DAG-FA species (−27%, P = 0.06). Training reduced both total ceramide content (−42%, P = 0.01) and the saturated ceramide species (−32%, P < 0.05). These findings suggest that the improved capacity for mitochondrial FA uptake and oxidation leads not only to a reduction in muscle lipid content but also a to change in the saturation status of lipids, which may, at least in part, provide a mechanism for the enhanced insulin action observed with endurance training in obese individuals.
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“exercise in obese humans increases muscle mitochondrial FAO and improves glucose tolerance and insulin sensitivity ([16](#B16)).”
From Mitochondrial fatty acid oxidation in obesity (2013) · cites this paper as [16]
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Excess Lipid Availability Increases Mitochondrial Fatty Acid Oxidative Capacity in Muscle
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Metadata
- Authors
- Bruce, C. R., Thrush, A. B., Mertz, V. A., Bezaire, V., Chabowski, A., Heigenhauser, G. J. F., & Dyck, D. J.
- Affiliations
- Garvan Institute of Medical Research (AU)
- Venue
- American Journal of Physiology-Endocrinology and Metabolism
- Publisher
- American Physiological Society
- Published
- 2006-07
- Volume
- 291
- Issue
- 1
- Pages
- E99-E107
- ISSN
- 0193-1849 (ISSN-L)
- 1522-1555
- OpenAlex
- W2168588760
- Cited by
- 328
- References
- 41
- Citations by year
- 2026: 6 · 2025: 11 · 2024: 5 · 2023: 6 · 2022: 9 · 2021: 11 · 2020: 20 · 2019: 13 · 2018: 12 · 2017: 19 · 2016: 15 · 2015: 9 · 2014: 18 · 2013: 22 · 2012: 32
- FWCI
- 15.91
- Type
- journal article
- Language
- en
- Open access
- green
- figshare.com
- Licence
- cc-by
- Locations
- American Journal of Physiology-Endocrinology and Metabolism (publishedVersion)
- PubMed (publishedVersion)
- Figshare (submittedVersion, cc-by)
- Funders
- University of Guelph
- Natural Sciences and Engineering Research Council of Canada
- Topics
- Health Sciences › Medicine › Physiology (medical) › Adipose Tissue and Metabolism
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
- Health Sciences › Medicine › Physiology (medical) › Cardiovascular and exercise physiology
- Keywords
- endurance training, obesity, glucose tolerance, insulin sensitivity, mitochondrial fatty acid oxidation, carnitine palmitoyltransferase 1, malonyl-CoA inhibition, muscle fat content, diacylglycerol, ceramide, triglycerides, fatty acid saturation, insulin resistance
- MeSH terms
- Adult, Blood Glucose, Carnitine O-Palmitoyltransferase, Citrate (si)-Synthase, Enoyl-CoA Hydratase, Fatty Acids, Female, Glucose Tolerance Test, Humans, Insulin, Male, Mitochondria, Muscle, Obesity, Triglycerides, Blotting, Western, Exercise, Muscle, Skeletal, Area Under Curve, Biopsy, Fine-Needle
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