Document Detail


Effects of prolonged exercise in highly trained traumatic paraplegic men.
MedLine Citation:
PMID:  3693218     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
This study investigated the cardiovascular and metabolic responses to prolonged wheelchair exercise in a group of highly trained, traumatic paraplegic men. Six endurance-trained subjects with spinal cord lesions from T10 to T12/L3 underwent a maximal incremental exercise test in which they propelled their own track wheelchairs on a motor-driven treadmill to exhaustion to determine maximal O2 uptake (VO2max) and related variables. One week later each subject exercised in the same wheelchair on a motorized treadmill at 60-65% of VO2max for 80 min in a thermoneutral environment (dry bulb 22 degrees C, wet bulb 17 degrees C). Approximately 10 ml of venous blood were withdrawn both 20 min and immediately before exercise (0 min), after 40 and 80 min of exercise, and 20 min postexercise. Venous blood was analyzed for hematocrit (Hct), hemoglobin (Hb), and lactate, and the separated plasma was analyzed for glucose, K+, Na+, Cl-, free fatty acid (FFA), and osmolality. VO2, CO2 production (VCO2), minute ventilation (VE), respiratory exchange ratio (R), net efficiency, and wheelchair strike rate were determined at four intervals throughout the exercise period. Data were analyzed with an analysis of variance repeated-measures design and a Scheffé post hoc test. VO2max was 47.5 +/- 1.8 (SE) ml.min-1.kg-1 with maximal VE BTPS and maximal heart rate (HR) being 100.1 +/- 3.8 l/min and 190 +/- 1 beats/min, respectively. During prolonged exercise there were no significant changes in VO2, VCO2, VE, R, net efficiency, wheelchair strike rate, and lactate, glucose, and Na+ concentrations. Significant increases occurred in HR, FFA, K+, Cl-, osmolality, Hb, and Hct throughout exercise.(ABSTRACT TRUNCATED AT 250 WORDS)
Authors:
G C Gass; E M Camp
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of applied physiology (Bethesda, Md. : 1985)     Volume:  63     ISSN:  8750-7587     ISO Abbreviation:  J. Appl. Physiol.     Publication Date:  1987 Nov 
Date Detail:
Created Date:  1988-01-27     Completed Date:  1988-01-27     Revised Date:  2013-09-26    
Medline Journal Info:
Nlm Unique ID:  8502536     Medline TA:  J Appl Physiol (1985)     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1846-52     Citation Subset:  IM    
Affiliation:
Department of Biological Sciences, Cumberland College of Health Sciences, Sydney, Australia.
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MeSH Terms
Descriptor/Qualifier:
Adult
Chlorides / blood
Exercise Test
Fatty Acids, Nonesterified / blood
Heart Rate*
Hematocrit
Hemoglobins / analysis
Humans
Lactates / blood
Male
Oxygen Consumption*
Paraplegia / blood,  metabolism*,  physiopathology
Physical Endurance*
Potassium / blood
Pulmonary Gas Exchange
Chemical
Reg. No./Substance:
0/Chlorides; 0/Fatty Acids, Nonesterified; 0/Hemoglobins; 0/Lactates; 7440-09-7/Potassium

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


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