PMID: 3758050Jan 1, 1986Paper

The effects of body position and exercise on plasma volume dynamics

European Journal of Applied Physiology and Occupational Physiology
J M PivarnikL C Senay

Abstract

We examined the plasma volume changes associated with a protocol of either exercise or controlled rest under identical positional and ambient conditions. Nine healthy adult males rode (E) and on another occasion sat quietly (C) on a cycle ergometer for 30 min. Ten minutes of cycle exercise immediately followed the resting C protocol. Ambient temperature was 30 degrees C (rh = 35%) and exercise load was equal to 50% of peak VO2. Venous blood samples were obtained with subjects both in the supine and seated positions prior to all experiments. Additional blood was drawn during minutes 1, 5, 10, and 30 in both experimental conditions. A final sample was taken during C after the 10 min exercise. Moving from the supine to a seated position resulted in an average loss of 162 ml of plasma across all experiments. During the E condition a further reduction in plasma volume (76 ml) occurred by one minute of exercise. Plasma volume stabilized by 5 min of exercise under the E protocol. During the C condition, subsequent fluid loss (98 ml) was not apparent until 10 min after the first seated sample and totalled 176 ml at the end of 30 min of rest. Ten minutes of cycling at the end of the C experiment resulted in a further plasma volume reduc...Continue Reading

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Citations

Jan 1, 1988·European Journal of Applied Physiology and Occupational Physiology·J M PivarnikM L Pollock
May 20, 2004·Nephrology, Dialysis, Transplantation : Official Publication of the European Dialysis and Transplant Association - European Renal Association·Anindya BanerjeeKen Farrington
May 13, 2005·Mayo Clinic Proceedings·Giris JacobDavid Robertson
Jun 21, 2011·Experimental Physiology·Matthew S GanioCraig G Crandall
Jul 23, 2019·Acta Physiologica·Mathias SteinachMichael Fähling

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