Document Detail

Faecal blood loss in response to exercise.
MedLine Citation:
PMID:  3115419     Owner:  NLM     Status:  MEDLINE    
Recently qualitative tests have indicated that gastrointestinal bleeding during exercise may be an important contributory factor in sports anaemia. In six healthy men who walked 37 km on four consecutive days faecal haemoglobin content remained normal (reference range 0.10-2.53 mg/g faeces) with no significant differences between values. In 28 marathon runners who refrained from taking drugs or food containing blood the median faecal haemoglobin content increased by 0.42 mg/g faeces (95% confidence interval 0.12 to 0.83 mg/g) from 1.06 (0.86 to 1.31) mg/g before the race. In 13 runners who had taken drugs before the race the corresponding increase in the median faecal haemoglobin content was 0.87 (-0.03 to 2.20) mg/g from the value before the race of 0.93 (0.46 to 1.55) mg/g. Prolonged walking had no effect on gastrointestinal blood loss. Intense endurance exercise in the form of marathon running induced a significant but clinically unimportant increase. This may be exaggerated by the ingestion of drugs and assume importance in causing iron deficiency and sports anaemia. The use of drugs, particularly analgesics, by marathon runners should be actively discouraged.
J D Robertson; R J Maughan; R J Davidson
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Publication Detail:
Type:  Clinical Trial; Controlled Clinical Trial; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  British medical journal (Clinical research ed.)     Volume:  295     ISSN:  0267-0623     ISO Abbreviation:  Br Med J (Clin Res Ed)     Publication Date:  1987 Aug 
Date Detail:
Created Date:  1987-11-17     Completed Date:  1987-11-17     Revised Date:  2009-11-18    
Medline Journal Info:
Nlm Unique ID:  8302911     Medline TA:  Br Med J (Clin Res Ed)     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  303-5     Citation Subset:  AIM; IM    
Department of Environmental and Occupational Medicine, University Medical School, Foresterhill, Aberdeen.
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MeSH Terms
Anemia / etiology
Feces / analysis
Gastrointestinal Hemorrhage / blood,  etiology*
Hemoglobins / analysis
Middle Aged
Physical Exertion*
Reference Values
Reg. No./Substance:

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