Document Detail


Excess postexercise oxygen consumption after aerobic exercise training.
MedLine Citation:
PMID:  20739722     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Literature examining the effects of aerobic exercise training on excess postexercise oxygen consumption (EPOC) is sparse. In this study, 9 male participants (19-32 yr) trained (EX) for 12 wk, and 10 in a control group (CON) maintained normal activity. VO(2max), rectal temperature (T(re)), epinephrine, norepinephrine, free fatty acids (FFA), insulin, glucose, blood lactate (BLA), and EPOC were measured before (PRE) and after (POST) the intervention. EPOC at PRE was measured for 120 min after 30 min of treadmill running at 70% VO(2max). EX completed 2 EPOC trials at POST, i.e., at the same absolute (ABS) and relative (REL) intensity; 1 EPOC test for CON served as both the ABS and REL trial because no significant change in VO(2max) was noted. During the ABS trial, total EPOC decreased significantly (p < .01) from PRE (39.4 ± 3.6 kcal) to POST (31.7 ± 2.2 kcal). T(re), epinephrine, insulin, glucose, and BLA at end-exercise or during recovery were significantly lower and FFA significantly higher after training. Training did not significantly affect EPOC during the REL trial; however, epinephrine was significantly lower, and norepinephrine and FFA, significantly higher, at endexercise after training. Results indicate that EPOC varies as a function of relative rather than absolute metabolic stress and that training improves the efficiency of metabolic regulation during recovery from exercise. Mechanisms for the decreased magnitude of EPOC in the ABS trial include decreases in BLA, T(re), and perhaps epinephrine-mediated hepatic glucose production and insulin-mediated glucose uptake.
Authors:
Darlene A Sedlock; Man-Gyoon Lee; Michael G Flynn; Kyung-Shin Park; Gary H Kamimori
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  International journal of sport nutrition and exercise metabolism     Volume:  20     ISSN:  1526-484X     ISO Abbreviation:  Int J Sport Nutr Exerc Metab     Publication Date:  2010 Aug 
Date Detail:
Created Date:  2010-08-26     Completed Date:  2010-11-02     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100939812     Medline TA:  Int J Sport Nutr Exerc Metab     Country:  United States    
Other Details:
Languages:  eng     Pagination:  336-49     Citation Subset:  IM    
Affiliation:
Wastl Human Performance Laboratory, Purdue University, W. Lafayette, IN, USA.
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MeSH Terms
Descriptor/Qualifier:
Adaptation, Physiological / physiology*
Adult
Blood Glucose / metabolism
Body Temperature / physiology
Energy Metabolism / physiology*
Epinephrine / blood
Exercise / physiology*
Fatty Acids, Nonesterified / blood
Humans
Insulin / metabolism
Lactates / blood
Male
Norepinephrine / blood
Oxygen Consumption / physiology*
Young Adult
Chemical
Reg. No./Substance:
0/Blood Glucose; 0/Fatty Acids, Nonesterified; 0/Lactates; 11061-68-0/Insulin; 51-41-2/Norepinephrine; 51-43-4/Epinephrine

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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