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Hematological changes following a marathon race in male and female runners

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Summary

The subjects of this experiment were well-trained men (6) and women (4) participating in a marathon race in Phoenix, Arizona, on a cool, cloudy, windy day. Venous blood was collected one week prior to the run, immediately after, and 4,8, and 24 h after the race. There were no significant changes in hematocrit, hemoglobin, or red blood cell counts following the race. The sample collected immediately after the race showed a pronounced leucocytosis. Differential counts showed that this increase in white blood cell count was limited to polymorphonuclear cells, suggesting that an inflammatory response to stress of the race was involved. Percentage changes in blood volume, red blood cell volume, and plasma volume were calculated from hematocrit and hemoglobin changes. These changes showed that there was reduction of plasma volume of 8% for females and 13% for males immediately after the race, with return to initial values within 8 h. We suggest that the increase in protein following the race was contributed by the flow of lymph from muscle to the vascular compartment.

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Authors and Affiliations

  1. Human Performance Laboratory, Department of Health and Physical Education, Arizona State University, 85287, Tempe, AZ, USA

    Christine L. Wells, Joel R. Stern & Lillian H. Hecht

Authors
  1. Christine L. Wells
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  2. Joel R. Stern
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  3. Lillian H. Hecht
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Additional information

This study was supported by an Arizona State University faculty grant-in-aid; the Dean's Research Fund, Arizona State University; and Technicon Corporation (Terrytown, NY)

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Wells, C.L., Stern, J.R. & Hecht, L.H. Hematological changes following a marathon race in male and female runners. Europ. J. Appl. Physiol. 48, 41–49 (1982). https://doi.org/10.1007/BF00421163

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  • DOI: https://doi.org/10.1007/BF00421163

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