Document Detail


Differences in epinephrine and substrate responses between arm and leg exercise.
MedLine Citation:
PMID:  2287255     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The purpose of this study was to determine epinephrine (EPI) and selected substrate responses during arm crank (AC) and leg cycle (LC) exercise at the same absolute and relative exercise intensity. Nine males performed 30 min AC and LC tests at 70% of ergometer-specific peak oxygen uptake (VO2), and a 30 min LC test eliciting a similar VO2 required during the AC test. Blood samples (30 ml) were collected via an indwelling arm catheter at rest, and at minutes 13 and 28 of exercise for determinations of plasma EPI, serum free fatty acid (FFA), serum glycerol (GLY), blood glucose (GLU), and blood lactate (LA) concentrations. At equivalent VO2, higher (P less than 0.05) EPI, LA, and respiratory exchange ratio (RER) responses were obtained during AC than LC exercise. However, these physiologic responses were similar during AC and LC exercise at the same relative intensity. No significant differences over time were observed for FFA, GLY, and GLU between AC and LC exercise at either the same absolute or relative intensity. The results support previous hypotheses that AC exercise is physiologically more stressful than LC exercise at the same VO2. The data further indicate that adrenomedullary activity (EPI response) and substrate utilization (LA and RER responses) are regulated by relative exercise intensity and not the exercising muscle mass.
Authors:
S P Hooker; C L Wells; M M Manore; S A Philip; N Martin
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Medicine and science in sports and exercise     Volume:  22     ISSN:  0195-9131     ISO Abbreviation:  Med Sci Sports Exerc     Publication Date:  1990 Dec 
Date Detail:
Created Date:  1991-03-22     Completed Date:  1991-03-22     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8005433     Medline TA:  Med Sci Sports Exerc     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  779-84     Citation Subset:  IM; S    
Affiliation:
Department of Family Resources and Human Development, Arizona State University, Tempe 85287-0404.
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MeSH Terms
Descriptor/Qualifier:
Adult
Arm / physiology*
Blood Glucose / metabolism
Epinephrine / blood*
Exercise / physiology*
Exercise Test
Fatty Acids, Nonesterified / blood
Glycerol / blood
Humans
Lactates / blood
Lactic Acid
Leg / physiology*
Male
Multivariate Analysis
Muscle Contraction / physiology
Chemical
Reg. No./Substance:
0/Blood Glucose; 0/Fatty Acids, Nonesterified; 0/Lactates; 50-21-5/Lactic Acid; 51-43-4/Epinephrine; 56-81-5/Glycerol

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


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