Cited by 397Muscle metabolism and nutritionCardiovascular and exercise physiologyAdipose Tissue and Metabolism

The DOI matches its Crossref record; 76 of the 76 references it cites were found in a registry or an index.

Lipid metabolism during endurance exercise

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Horowitz, Jeffrey F, Klein, Samuel·2000·The American Journal of Clinical Nutrition

Abstract

Endogenous triacylglycerols represent an important source of fuel for endurance exercise. Triacylglycerol oxidation increases progressively during exercise; the specific rate is determined by energy requirements of working muscles, fatty acid delivery to muscle mitochondria, and the oxidation of other substrates. The catecholamine response to exercise increases lipolysis of adipose tissue triacylglycerols and, presumably, intramuscular triacylglycerols. In addition, increases in adipose tissue and muscle blood flow decrease fatty acid reesterification and facilitate the delivery of released fatty acids to skeletal muscle. Alterations in fatty acid mobilization and the relative use of adipose and intramuscular triacylglycerols during exercise depend, in large part, on degree of fitness and exercise intensity. Compared with untrained persons exercising at the same absolute intensity, persons who have undergone endurance training have greater fat oxidation during exercise without increased lipolysis. Available evidence suggests that the training-induced increase in fat oxidation is due primarily to increased oxidation of non-plasma-derived fatty acids, perhaps from intramuscular triacylglycerol stores. Fat oxidation is lower in high-intensity exercise than in moderate-intensity exercise, in part because of decreased fatty acid delivery to exercising muscles. Parenteral lipid supplementation during high-intensity exercise increases fat oxidation, but the effect of ingesting long-chain or medium-chain triacylglycerols on substrate metabolism during exercise is less clear. This review discusses the relation between fatty acid mobilization and oxidation during exercise and the effect of endurance training, exercise intensity, and lipid supplementation on these responses.

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Metadata

Authors
Horowitz, J. F., & Klein, S.
Affiliations
Washington University in St. Louis (US)
Venue
The American Journal of Clinical Nutrition
Publisher
Elsevier BV
Published
2000-08
Volume
72
Issue
2
Pages
558S-563S
ISSN
0002-9165 (ISSN-L)
OpenAlex
W2170377446
Cited by
397
References
76
Citations by year
2026: 11 · 2025: 18 · 2024: 17 · 2023: 18 · 2022: 22 · 2021: 24 · 2020: 28 · 2019: 16 · 2018: 18 · 2017: 14 · 2016: 23 · 2015: 22 · 2014: 20 · 2013: 11 · 2012: 14
FWCI
0.61
Type
journal article
Language
en
Open access
Locations
  • American Journal of Clinical Nutrition (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (5p41rr000954-34)
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK37948, R01DK037948)
  • National Center for Research Resources (RR 00954, RR0036)
Topics
  • Health Sciences › Nursing › Nutrition and Dietetics › Muscle metabolism and nutrition
  • Health Sciences › Medicine › Physiology (medical) › Cardiovascular and exercise physiology
  • Health Sciences › Medicine › Physiology (medical) › Adipose Tissue and Metabolism
Keywords
lipid metabolism, endurance exercise, triacylglycerol oxidation, fat oxidation, lipolysis, fatty acid mobilization, adipose tissue, catecholamines, endurance training, exercise intensity, lipid supplementation, medium-chain triglycerides, long-chain triglycerides, skeletal muscle
MeSH terms
Adipose Tissue, Exercise Test, Fatty Acids, Humans, Lipolysis, Mitochondria, Physical Endurance, Physical Fitness, Triglycerides, Exercise, Muscle, Skeletal, Dietary Supplements

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