Document Detail


Lipid metabolism during exercise. II. Respiratory exchange ratio and muscle glycogen content during 4 h bicycle ergometry in two groups of healthy men.
MedLine Citation:
PMID:  7190919     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Seven physically fit (well-trained, maximal oxygen uptake 69.6 +/- 4.4 ml x kg-1 min-1) and eight less fit (moderately trained, maximal oxygen uptake 56.1 +/- 5.7 ml x kg-1 x min-1) healthy male subjects were exercised for 4 h by bicycle ergometry against a pedalling resistance calculated to cause oxygen consumption corresponding to approximately 30% of each individual's maximal oxygen uptake value. Respiratory exchange ratio was estimated at 1 h and blood glucose and lactate concentrations and muscle glycogen content at 2 h intervals. Muscle glycogen content decreased markedly during the first 2 h of exercise in the well-trained group but was similar after 4 h exercise in both groups. No major differences were observed between the two subject groups in blood variable concentrations. Calculations based on respiratory exchange ratio showed that the proportion of carbohydrates utilized in the total energy consumption was 14% in the physically fit group and 25% in the less fit group, thus supporting previous observations that more energy is derived by fat oxidation in well-trained than in less-trained individuals during submaximal work at relatively similar oxygen consumption levels.
Authors:
P Rahkila; J Soimajärvi; E Karvinen; V Vihko
Related Documents :
3466659 - The second wind phenomenon in mcardle's disease.
21147819 - Exercise in patients with breast cancer and healthy controls: energy substrate oxidatio...
10492449 - Combined effect of epinephrine and exercise on calpain/calpastatin and cathepsin b and ...
7085419 - Sparing effect of chronic high-altitude exposure on muscle glycogen utilization.
10517759 - Metabolic response in type i and type ii muscle fibers during a 30-s cycle sprint in me...
9124329 - Tricarboxylic acid cycle intermediates in human muscle at rest and during prolonged cyc...
16884179 - Use of human nasal cannulas during bronchoscopy procedures as a simple method for maint...
4094019 - The effect of varied stride rate upon shank deceleration in running.
8964719 - Role of hematocrit in the recruitment of pulmonary diffusing capacity: comparison of hu...
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  European journal of applied physiology and occupational physiology     Volume:  44     ISSN:  0301-5548     ISO Abbreviation:  Eur J Appl Physiol Occup Physiol     Publication Date:  1980  
Date Detail:
Created Date:  1980-11-25     Completed Date:  1980-11-25     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0410266     Medline TA:  Eur J Appl Physiol Occup Physiol     Country:  GERMANY, WEST    
Other Details:
Languages:  eng     Pagination:  245-54     Citation Subset:  IM; S    
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Blood Glucose / metabolism
Energy Metabolism
Glycogen / metabolism*
Humans
Lactates / blood
Male
Muscles / metabolism*
Oxygen / blood
Physical Exertion*
Respiration*
Chemical
Reg. No./Substance:
0/Blood Glucose; 0/Lactates; 7782-44-7/Oxygen; 9005-79-2/Glycogen

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


Previous Document:  Climatic heat stress and performance in the Wingate Anaerobic Test.
Next Document:  The synergy of elbow extensor muscles during dynamic work in man. I. Elbow extension.