Document Detail


Metabolic Regulation of Fat Use during Exercise and in Recovery.
MedLine Citation:
PMID:  22301835     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Fat is an important fuel for exercise but plays a secondary role to carbohydrate (CHO). Increasing fat use during exercise can decrease the reliance on CHO and spare CHO for later in training sessions or competitions that depend on CHO for success. The pathways that metabolize and oxidize fat are activated more slowly than CHO at the onset of exercise and reach a maximum at moderate exercise intensities. As exercise intensity increases to ∼75% VO2max and beyond, fat metabolism is inhibited: using CHO will increase the amount of energy produced per liter of oxygen consumed. The capacity for fat use during exercise is increased by aerobic training and the dietary combination of little or no CHO intake and high fat intake. Fat oxidation is very dependent on the mitochondrial volume of muscle but other key sites of regulation include release of fat from storage forms and fat transport across plasma and mitochondrial membranes. This chapter examines the control of fat metabolism during moderate and intense exercise with an emphasis on human findings and the adaptations that occur with aerobic training and other acute nutritional manipulations. Recent work using molecular and cellular compartmentalization techniques have advanced the knowledge in this area.
Authors:
Lawrence L Spriet
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Publication Detail:
Type:  Journal Article     Date:  2012-01-18
Journal Detail:
Title:  Nestlé Nutrition Institute workshop series     Volume:  69     ISSN:  1664-2147     ISO Abbreviation:  Nestle Nutr Inst Workshop Ser     Publication Date:  2011  
Date Detail:
Created Date:  2012-02-03     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101577268     Medline TA:  Nestle Nutr Inst Workshop Ser     Country:  Switzerland    
Other Details:
Languages:  eng     Pagination:  39-58     Citation Subset:  IM    
Copyright Information:
Copyright © 2011 S. Karger AG, Basel.
Affiliation:
Department of Human Health and Nutritional Science, University of Guelph, Guelph, ON, Canada.
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