Document Detail


Ventilatory and treadmill endurance during acute semistarvation.
MedLine Citation:
PMID:  3722050     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Little is known about respiratory muscle function in acute undernutrition, although an inadequate caloric intake is common in numerous disease states. Twelve young-adult, healthy female volunteers performed two familiarization experiments and were then studied after 7 days of consuming 40% of normal daily caloric intake as well as after 1 wk of normal caloric intake. In each experiment subjects performed tests of resting pulmonary function, inspiratory muscle strength, and ventilatory endurance, the last of which involved two 60-s and two 6-min isocapnic maximum voluntary ventilation maneuvers. Subjects then walked to exhaustion in 8-20 min on a treadmill. The caloric restriction did not affect performance of any breathing test but did lower endurance time in severe treadmill exercise (P less than 0.05). Basal metabolic rate was lowered, resting blood levels of free fatty acids and beta-hydroxybutyrate elevated, and glucose lowered following the caloric restriction (P less than 0.05). Blood lactate levels were lower during and after exercise following caloric restriction (P less than 0.05). We conclude that ventilatory muscle strength and endurance are fully preserved in caloric restriction severe enough to cause mild ketoacidosis and hypoglycemia, lowered basal metabolic rate, and decreased endurance in severe treadmill exercise.
Authors:
P R Bender; B J Martin
Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Journal of applied physiology (Bethesda, Md. : 1985)     Volume:  60     ISSN:  8750-7587     ISO Abbreviation:  J. Appl. Physiol.     Publication Date:  1986 Jun 
Date Detail:
Created Date:  1986-08-18     Completed Date:  1986-08-18     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:  1823-7     Citation Subset:  IM; S    
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MeSH Terms
Descriptor/Qualifier:
Acute Disease
Adult
Basal Metabolism
Blood Chemical Analysis
Female
Humans
Physical Endurance*
Physical Exertion*
Respiration*
Respiratory Function Tests
Starvation / blood,  physiopathology*
Grant Support
ID/Acronym/Agency:
HL-26351/HL/NHLBI NIH HHS

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