| Summary: | Moderate to intensive physical exercisegenerates different types of response in an individual.These responses depend upon the typeof exercise and the duration of it, and they canbe acute or chronic. Exercise affects differentcorporal system, among those is the hematologicalsystem. Literature describes changes inthe blood volume, changes in the activity andpopulation of white blood cells, as well asmodifications in the humoral and cellularimmunity, and in the count and shape of bloodplatelets. Also and as a result of those changes, ithas been determined too, that exercise modifiesin a negative way the life time of red blood cells,generating an apparent anemia, that has beenwidely discuss and that might be, among manyfactors, associated to hemolysis. This hemolysismight be associated with osmotic mechanismsor oxidative stress. The true is that all thoseevents are strongly related and may cause a lowperformance in the practice of any physicalactivity, including that of sportsmen.
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