Document Detail

Prior exercise increases dietary oleate, but not palmitate oxidation.
MedLine Citation:
PMID:  14694216     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: Higher levels of physical activity have been associated with body weight maintenance, but previous work in our laboratory suggests that this is not purely related to energy balance. We hypothesize that this may be related to the partitioning of dietary fat between oxidation and storage. RESEARCH METHODS AND PROCEDURES: Healthy women (age 24 +/- 1 years, BMI = 21.2 +/- 0.4 kg/m2) were recruited to participate in rest (n = 10) or exercise sessions of light (n = 11), moderate (n = 10), and heavy (n = 7) exercise. All exercises (1250 kJ above rest) were performed on a stationary cycle inside of a whole-body calorimeter. [1-(13)C]oleate and [d31]palmitate were given in a liquid meal 30 minutes post-exercise. An additional study was done with identical exercise sessions, but with administration of an oral dose of [1-(13)C]acetate and [d3]acetate 30 minutes post-exercise to determine label sequestration. RESULTS: Cumulative oxidation of [1-(13)C]oleate was significantly greater after light (45 +/- 3%), moderate (54 +/- 4%), and heavy (51 +/- 4%) exercise than that with rest (33 +/- 3%) (p = 0.0008). Cumulative oxidation of [d31]palmitate did not differ among trials (12 +/- 2%, 14 +/- 1%, 17 +/- 2%, and 14 +/- 2% for rest, light, moderate, and heavy, respectively; p = 0.30). DISCUSSION: Exercise standardized for energy expenditure increases monounsaturated fat oxidation more than saturated fat oxidation and that the increase occurs regardless of intensity. Recommendations for physical activity for the purposes of weight control may be specific for dietary fat composition.
Susanne B Votruba; Richard L Atkinson; Dale A Schoeller
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Obesity research     Volume:  11     ISSN:  1071-7323     ISO Abbreviation:  Obes. Res.     Publication Date:  2003 Dec 
Date Detail:
Created Date:  2003-12-24     Completed Date:  2004-04-16     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  9305691     Medline TA:  Obes Res     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1509-18     Citation Subset:  IM    
Department of Nutritional Sciences, University of Wisconsin, Madison, Wisconsin 53706, USA.
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MeSH Terms
Breath Tests
Calorimetry, Indirect
Carbon Dioxide / metabolism
Dietary Fats / metabolism*
Energy Metabolism / physiology
Exercise / physiology*
Oleic Acid / metabolism*
Palmitates / metabolism*
Grant Support
Reg. No./Substance:
0/Dietary Fats; 0/Palmitates; 112-80-1/Oleic Acid; 124-38-9/Carbon Dioxide

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