Abstract
Performance of intense dynamic exercise in highly trained athletes may be associated with a drop in arterial O2 saturation (%SaO2), also called exercise-induced hypoxemia (EIH) (4, 9). The causes for this gas exchange imperfection are unclear, but ventilation-perfusion mismatch is considered an important factor (5, 6). Blood flow distribution in the lung is greatly influenced by body position, and ventilation-perfusion distribution, reportedly, is more homogenous in the supine (Sup) than in the upright (Up) position (1). In order to examine the influence of body posture on %SaO2 in exercise, we exercised a group of elite road cyclists progressively to maximum in Sup and Up, the hypothesis being that an expected desaturation in upright cycling would disappear or be reduced during supine work as a result of attenuation of uneven ventilation-perfusion distribution.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Amis, T. C., H. A. Jones, and J. M. B. Hughes. Effect of posture on inter-regional distribution of pulmonary perfusion and ̇VVA/Q̇Q ratios in man. Resp. Physiol. 56: 169–182, 1984.
Bell, C. W., S. F. Drehsen, I. Kass, and L. W. Burgher. A comparison of vertical and horizontal position exercise on arterial oxygen saturation in pulmonary patients. Med. Sci. Sports Exerc. 14: 132, 1982.
Dempsey, J. A., N. Gledhill, W. G. Reddan, H. V. Forster, P. G. Hanson, and A. D. Claremont. Pulmonary adaptation to exercise: effects of exercise type and duration, chronic hypoxia and physical training. Ann. New York Acad. Sci. 301: 243–261, 1977.
Dempsey, J. A., P. G. Hansson, and K. S. Henderson. Exercise-induced arterial hypoxemia in healthy human subjects at sea level. J. Physiol. (Lond.) 355: 161–178, 1984
Hammond, M. D., G. E. Gale, S. Kapitän, A. Ries, and P. D. Wagner. Pulmonary gas exchange in humans during exercise at sea level. J. Appl. Physiol. 60: 1590–1598, 1985
Hopkins, S. R., D. C. McKenzie, R. B. Schoene, R. W. Glenny, and H. T. Robertson. Pulmonary gas exchange during exercise in athletes. I. Ventilation-perfusion mismatch and diffusion limitation. J. Appl. Physiol. 77:912–917, 1994.
Inbar, O., Y. Weinstein, A. Kowalski, S. Epstein, and A. Rotstein. Effects of increased ventilation and improved pulmonary gas exchange on maximal oxygen uptake and power output. Scand. J. Med. Sci. Sports 3:81–88, 1993.
Pedersen, P. K., K. Madsen, C. Andersen, N. H. Secher, and K. Jensen. Arterial oxygen desaturation during dynamic exercise. Med. Sci. Sports Exerc. Suppl. 24: S69, 1992.
Powers, S. K, D. Martin, M. Cicale, N. Collop, D. Huang, and D. Criswell. Exercise-induced hypoxemia in athletes: role of inadequate hyperventilation. Eur. J. Appl. Physiol. 65: 37–42, 1992.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1996 Springer Science+Business Media New York
About this chapter
Cite this chapter
Pedersen, P.K., Mandøe, H., Jensen, K., Andersen, C., Madsen, K. (1996). Arterial O2 Desaturation During Supine Exercise in Highly Trained Cyclists. In: Steinacker, J.M., Ward, S.A. (eds) The Physiology and Pathophysiology of Exercise Tolerance. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-5887-3_23
Download citation
DOI: https://doi.org/10.1007/978-1-4615-5887-3_23
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4613-7700-9
Online ISBN: 978-1-4615-5887-3
eBook Packages: Springer Book Archive