Haemoglobin, Blood Volume, Cardiac Function, and Aerobic Power

Author:

Gledhill Norman,Warburton Darren,Jamnik Veronica

Abstract

Alterations in [Hb], which are mediated through changes in arterial oxygen content, and alterations in BV, which are mediated through changes in cardiac output [Formula: see text] have a significant effect on both [Formula: see text] and aerobic performance. If BV is held constant, a decrease in [Hb] (anaemia) causes a decrease in [Formula: see text] and aerobic performance, while an increase in [Hb] (blood doping) causes an increase in [Formula: see text] and aerobic performance. If [Hb] is held constant, an increase in BV can cause an increase in both [Formula: see text] and aerobic performance, while a decrease in BV can cause a decrease in both [Formula: see text] and aerobic performance. In addition, an increase in BV can compensate for moderate reductions in [Hb] through increases in [Formula: see text], allowing [Formula: see text] to remain unchanged or even increase. Also, a large portion of the difference in the enhanced cardiovascular function of endurance athletes is due to their high BV and the resultant enhancement of diastolic function. Hence, optimizing both [Hb] and BV is a very important consideration for endurance performance. Key words: blood doping, sport anemia, stroke volume

Publisher

Canadian Science Publishing

Subject

Orthopedics and Sports Medicine,Physiology

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