Abstract
We studied mechanisms of O2 transport in 6 adult (2–5 year old) horses at rest and during steady-state exercise on a treadmill (0% slope) at 12 m/s (a submaximal gallop). Oxygen consumption was measured using an open-flow system. Arterial and mixed venous blood samples were simultaneously obtained for measurement of O2 content and hemoglobin concentration. \(\rm\dot{v}\)O2 increased from 1.5±0.2 L/min at rest to 46.2±4.8 L/min during exercise. HR increased from a resting value of 36.9±2.5 bpm to 196.5±10.9 bpm and the arterio-venous O2 content difference (a-\(\rm\bar{V}\) O2) increased from 4.2±0.8 ml O2/100 ml blood to 20.3±1.6 ml O2/100 ml blood.
The 30.4-fold increase in oxygen consumption in the horse at submaximal \(\rm\dot{v}\)O2 versus only a 10-fold increase in man at \(\rm\dot{v}\)O2 max demonstrates the marked ability of the horse to transfer O2 at each step in the O2 transport pathway.
This is a preview of subscription content, log in via an institution to check access.
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
Astrand, P.O., T.E. Cuddy, B. Saltin and J. Stenberg (1964). Cardiac output during submaximal and maximal work. J. Appl. Physiol. 19:268.
Astrand, P.O. and K. Rodahl (1986). Textbook of Work Physiology. New York, McGraw-Hill Book Co., pp. 181–185.
Bayly, W.M., R.B. Schultz, D.R. Hodgson and P.D. Gollnick (1987). Diffusion impairment as a cause of exercise-induced hypoxemia. In; Equine Exercise Physiology 2, eds. by J.R. Gillespie & N.E. Robinson. Davis, CA, ICEEP Public, (in press)
Brooks, G.A. and T.D. Fahey (1984). Exercise Physiology; Human Bioenergetics and Its Applications. New York, John Wiley & Sons, pp. 332–333.
Engelhardt, W. von (1977). Cardiovascular effects of exercise and training in horses. Adv. in Vet. Sci. and Comp. Med. 21;173–205.
Evans, D.L. and R.J. Rose (1987). Maximal aerobic capacity in the racehorse: prediction and correlation. In; Equine Exercise Physiology 2, ed J.R. Gillespie and N.E. Robinson. Davis, CA, ICEEP Public,. (in press)
Forster, H.V., L.G. Pan, G.E. Bisgard, S.M. Dorsey, and M.S. Britton (1984). Temporal pattern of pulmonary gas exchange during exercise in ponies. J. Appl. Physiol. 57(3):760–767.
Hoppeler, H., J. Jones, S.L. Lindstedt, C.R. Taylor, E.R. Weibel, and A. Lindholm (1987). Relating \(\rm\dot{v}\)O2 max to skeletal muscle mitochondria in horses. In: Equine Exercise Physiology 2, eds. J.R. Gillespie and N.E. Robinson. Davis, CA, ICEEP Public, (in press)
Karlsen, G.G. and E.A. Nadaljak (1964). Konevodstvo I Konnyisport 34(11); 27–31.
Persson, S.G.B. (1967). On blood volume and working capacity in horses. Acta Vet. Scand. Suppl. 19:1–189.
Powers, S., R. Beadle, J. Lawler and D. Thompson (1987). Respiratory gas exchange kinetics in transitions from rest or prior exercise in ponies. In; Equine Exercise Physiology 2, eds. J.R. Gillespie and N.E. Robinson. Davis, CA, ICEEP Public, (in press)
Seeherman, J.J., C.R. Taylor, G.M.O. Maloiy and R.B. Armstrong (1981). Design of the mammalian respiratory system. II. Measuring maximum aerobic capacity. Respir. Physiol. 44:11–23.
Thomas, D.P. and G.F. Fregin (1981). Cardiorespiratory and metabolic responses to treadmill exercise in the horse. J. Appl. Physiol. 50(4);864–868.
Thornton, J., G. Essen-Gustavsson, A. Lindholm, D. McMiken, S. Persson (1983). Effects of training and detraining on oxygen uptake, cardiac output, blood gas tensions, pH, and lactate concentrations during and after exercise in the horse. In; Equine Exercise Physiology, eds. D.H. Snow, S.G.B. Persson, and R.J. Rose. Cambridge, Granta Editions, pp. 470–486.
Thornton, J., J. Pagan and S. Persson (1987). The oxygen cost of weight loading and uphill treadmill exercise in the horse. In; Equine Exercise Physiology 2, eds. J.R. Gillespie and N.E. Robinson. Davis, CA, ICEEP Public, (in press)
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1988 Plenum Press, New York
About this paper
Cite this paper
Landgren, G.L., Gillespie, J.R., Fedde, M.R., Jones, B.W., Pieschl, R.L., Wagner, P.D. (1988). O2 Transport in the Horse During Rest and Exercise. In: Gonzalez, N.C., Fedde, M.R. (eds) Oxygen Transfer from Atmosphere to Tissues. Advances in Experimental Medicine and Biology, vol 227. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-5481-9_30
Download citation
DOI: https://doi.org/10.1007/978-1-4684-5481-9_30
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4684-5483-3
Online ISBN: 978-1-4684-5481-9
eBook Packages: Springer Book Archive