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Blood is the third component of the circulation system, that changes along with an increase of metabolism. While the duration of exercise increases, the changes of
body fluid play an important role in maintaining perfomance efficiency and these changes not only effect the duration of exercise and competition but are vital for
health. Some of the hematological! changes are non significant and this implies an over training syndrome.
In this study, some RBC indexes such as RBC, HOB, HCT, MCV, MCH, MCHC are evaluated before and after aerobic exercise, as a semi-experimental study.
For this purpose, fourteen elite athletes who completed the health inventory, were selected as subjects. Blood samples were take thirty minuts before exercise at
rest condition. Then subjects, after adapting to speed and gradient of a tredmill and reached, start aerobic exercise until exhaustion is as bruce protocol.
Also heart rate was measured of different phases. Blood samples were take immediately after exercise again. Then samples frozen in EDT A were transferd to a
medical laboratory for evaluation of above mentioned indexes. Data obtained from pre and post test were analysis with SPSS.