Cited by 77Cardiovascular and exercise physiologyMuscle metabolism and nutritionAdipose Tissue and Metabolism

Fatty acid kinetic responses to exercise. Effects of obesity, body fat distribution, and energy-restricted diet.

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Kanaley, J A, Cryer, P E, Jensen, M D·1993·Journal of Clinical Investigation

Abstract

UNLABELLED: Upper body obesity (UB Ob) is associated with a reduced net free fatty acid (FFA) response to epinephrine compared with nonobese (Non Ob) and lower-body obese (LB Ob) women. Because catecholamines regulate some of the metabolic responses to exercise, we hypothesized that UB Ob would have a reduced net FFA response to exercise. Plasma FFA rate of appearance (Ra) ([1-14C]palmitate) and fatty acid oxidation (indirect calorimetry) were therefore measured during 2.5 h of stationary bicycle exercise (45% VO2 peak) in 13 UB Ob, 11 LB Ob, and 8 Non Ob premenopausal women. 10 UB Ob and 8 LB Ob women were retested after an approximately 8-kg weight loss. RESULTS: During exercise Non Ob and LB Ob women had greater increments in FFA availability (51 +/- 7 and 53 +/- 8 mmol, respectively) than UB Ob women (27 +/- 4 mmol, P < 0.05). Total exercise FFA availability and fatty acid oxidation were not different between Non Ob, LB Ob, and UB Ob women, however. Following weight loss (approximately 8 kg), the FFA response to exercise increased (P < 0.01) and remained greater (P < 0.05) in LB Ob than in UB Ob women. In conclusion, the FFA response to exercise was reduced in UB Ob women before and after weight loss, but no effects on fatty acid oxidation were apparent.

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  1. Faloona, G., and R. H. Unger. 1974. Glucagon. In Methods of Hormone Radioimmunoassay. B. Jaffe and H. Behrman, editors. Academic Press, Inc., San Diego, CA. 317-330.
  2. Peake, G. T. 1974. Growth Hormone. In Methods of Hormone Radioim- munoassay. B. Jaffe and H. R. Behrman, editors. Academic Press, Inc., San Diego, CA. 103-121.

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Authors
Kanaley, J. A., Cryer, P. E., & Jensen, M. D.
Affiliations
  • Mayo Clinic (US)
  • Washington University in St. Louis (US)
Venue
Journal of Clinical Investigation
Published
1993-07-01
Volume
92
Issue
1
Pages
255-261
ISSN
0021-9738 (ISSN-L)
OpenAlex
W2128318541
Cited by
77
References
38
Citations by year
2025: 3 · 2023: 1 · 2022: 6 · 2020: 5 · 2018: 1 · 2017: 1 · 2016: 2 · 2015: 3 · 2014: 1 · 2013: 3 · 2012: 2
FWCI
5.33
Type
journal article
Language
en
Open access
Locations
  • Journal of Clinical Investigation (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Mayo Clinic
  • Mayo Foundation for Medical Education and Research
  • National Institutes of Health (RR‐00036, RR-00585)
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK1-107352, DK1-140484)
  • National Center for Research Resources (RR 00035)
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
upper body obesity, lower body obesity, body fat distribution, free fatty acids, fatty acid oxidation, physical activity, weight loss, hypocaloric diet, premenopausal women, catecholamines
MeSH terms
Body Composition, Diet, Reducing, Physical Exertion, Fatty Acids, Nonesterified, Female, Humans, Insulin, Ketone Bodies, Lipid Mobilization, Obesity, Oxygen Consumption, Carbohydrate Metabolism

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