title: [Hematologic changes induced by exertion during a long-distance race].
abstract: OBJECTIVE
  To evaluate the haematological changes induced by a long-distance race in well trained runners.
  
  
  METHODS
  The haematological changes presented by 17 runners (15 men and 2 women) were assessed in a 6-hour race. For this purpose samples were examined before the race, 2 hours later, 4 hours later, at the end of the race, and 4 days after the trial.
  
  
  RESULTS
  Haemoglobin rates, as well as leucocyte, neutrophil, monocyte and platelet counts were increased, probably due to decreased plasma volume. Haemolytic traits were seen as well, namely, increased reticulocyte count and decreased haptoglobin. High transferrin-transport capability and serum B12 levels were also present. Mild haematuria was found without any haemosiderinuria, siderinuria or haemoglobinuria. All these changes recovered in the post-race study.
  
  
  CONCLUSIONS
  Changes in the major haematologic values are present during long-distance races, some of them due to haemoconcentration. Leucocytosis, haemolysis and haematuria are noteworthy, and these findings must be borne in mind when evaluating the health of runners.
authors.affiliation: Servicio de Hematología, Hospital de la Santa Creu i Sant Pau, Barcelona.
authors.forename: A F
authors.initials: AF
authors.lastname: Remacha
authors.forename: J
authors.initials: J
authors.lastname: Ordóñez
authors.forename: F
authors.initials: F
authors.lastname: García-Díe
authors.forename: A
authors.initials: A
authors.lastname: Estruch
authors.forename: E
authors.initials: E
authors.lastname: Gimferrer
mesh_terms: D000328:Adult; D001772:Blood Cell Count; D001798:Blood Proteins / Q000032:analysis*; D005260:Female; D005293:Ferritins / Q000032:analysis; D005492:Folic Acid / Q000097:blood; D006417:Hematuria / Q000209:etiology*; D006454:Hemoglobins / Q000032:analysis; D006461:Hemolysis; D006801:Humans; D007501:Iron / Q000097:blood; D007964:Leukocytosis / Q000209:etiology*; D008297:Male; D008875:Middle Aged; D012420:Running / Q000502:physiology*; D014168:Transferrin / Q000032:analysis; D014805:Vitamin B 12 / Q000097:blood
chemical_list: D001798:Blood Proteins; D006454:Hemoglobins; D014168:Transferrin; D005293:Ferritins; D005492:Folic Acid; D007501:Iron; D014805:Vitamin B 12
vernacular_title: Cambios hematológicos inducidos por el ejercicio durante una carrera de largas distancias.