Training-induced hypervolemia

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Abstract
To investigate the effect of training-induced increases in plasma volume on maximal aerobic power, 8 male subjects (age 19 to 24 yr) underwent a 4-d training program (2 h.d−1 at an estimated 71% maximal aerobic power. Following training, plasma volume measured using 131-human serum albumin increased by 20.3% (P< 0.01) whereas red cell volume remained unchanged and total blood volume increased by 12.3% (P< 0.01). During progressive sub-maximal cycle exercise, oxygen consumption, carbon dioxide production, ventilation, and blood lactate concentration remained unchanged following the training whereas heart rate was significantly elevated (P < 0.05). Significant post-training elevations were also noted in carbon dioxide production (P < 0.05), blood lactate (P < 0.01), and peak power output (P < 0.05) during maximal exercise. Maximal aerobic power and ventilation were not altered. It is concluded that hypervolemia induced by short-term exercise training does not affect oxygen consumption either during sub-maximal or maximal exercise.

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