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Post-exercise fat oxidation: effect of exercise duration, intensity and modality


Warren, A and Howden, EJ and Williams, AD and Fell, JW and Johnson, NA, Post-exercise fat oxidation: effect of exercise duration, intensity and modality, International Journal of Sports Nutrition and Exercise Metabolism, 19, (6) pp. 607-623. ISSN 1526-484X (2009) [Refereed Article]

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Copyright 2009 Human Kinetics, Inc.

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DOI: doi:10.1123/ijsnem.19.6.607


Postexercise fat oxidation may be important for exercise prescription aimed at optimizing fat loss. The authors examined the effects of exercise intensity, duration, and modality on postexercise oxygen consumption (VO2) and substrate selection/respiratory-exchange ratio (RER) in healthy individuals. Three experiments (n = 7 for each) compared (a) short- (SD) vs. long-duration (LD) ergometer cycling exercise (30 min vs. 90 min) matched for intensity, (b) low- (LI) vs. high-intensity (HI) cycling (50% vs. 85% of VO2max) matched for energy expenditure, and (c) continuous (CON) vs.interval (INT) cycling matched for energy expenditure and mean intensity. All experiments were administered by crossover design. Altering exercise duration did not affect postexercise VO2 or RER kinetics (p >.05). However, RER was lower and fat oxidation was higher during the postexercise period in LD vs. SD (p < .05). HI vs. LI resulted in a significant increase in total postexercise energy expenditure and fat oxidation (p < .01). Altering exercise modality (CON vs. INT) did not affect postexercise VO2, RER, or fat oxidation (p > .05). These results demonstrate that postexercise energy expenditure and fat oxidation can be augmented by increasing exercise intensity, but these benefits cannot be exploited by undertaking interval exercise (1:2-min work:recovery ratio) when total energy expenditure, duration, and mean intensity remain unchanged. In spite of the apparent benefit of these strategies, the amount of fat oxidized after exercise may be inconsequential compared with that oxidized during the exercise bout.

Item Details

Item Type:Refereed Article
Keywords:exercise metabolism, EPOC, recovery, weight management
Research Division:Health Sciences
Research Group:Sports science and exercise
Research Field:Exercise physiology
Objective Division:Health
Objective Group:Clinical health
Objective Field:Clinical health not elsewhere classified
UTAS Author:Warren, A (Ms Amy Warren)
UTAS Author:Howden, EJ (Ms Erin Howden)
UTAS Author:Williams, AD (Associate Professor Andrew Williams)
UTAS Author:Fell, JW (Associate Professor James Fell)
UTAS Author:Johnson, NA (Dr Nathan Johnson)
ID Code:60204
Year Published:2009
Web of Science® Times Cited:33
Deposited By:Health Sciences A
Deposited On:2010-01-20
Last Modified:2012-11-13
Downloads:6 View Download Statistics

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