Author:
Waller Amanda,Heigenhauser George J,Lindinger Michael I
Abstract
AbstractThe present study used the physicochemical approach to characterize the changes in acid–base status that occur in Standardbreds after post-exercise electrolyte supplementation. Jugular venous blood was sampled from six conditioned Standardbreds on two separate occasions, at rest and for 24 h following a competitive exercise test (CET) designed to simulate the speed and endurance test of a 3-day event. After the CETs, horses were given water ad libitum and either a hypotonic commercial electrolyte solution, via nasogastric tube followed by a typical hay/grain meal, or a hay/grain meal alone. The electrolyte supplementation resulted in c. 2 mmol l− 1 decreased plasma [TCO2] during the recovery period as compared with control. The primary contributor to the decreased [TCO2] with electrolyte supplementation was a decreased strong ion difference ([SID]), as a result of the non-significant increase in plasma [Cl− ]. Additionally, electrolyte supplementation resulted in faster restoration of hydration status compared with control, as evidenced by faster recovery of plasma [protein] and total weak acid concentration ([Atot]). It is concluded that oral administration of a hypotonic electrolyte solution after prolonged moderate-intensity exercise diminishes the post-exercise alkalosis, and that recovery of hydration status is still incomplete 24 h after exercise when no electrolytes are given. Thus, supplementation with electrolytes according to estimated sweat losses may attenuate post-exercise increases in plasma [TCO2], which is of significant practical interest to the horse racing community, as a testing threshold of greater than 37 mmol l− 1 is used by many racing jurisdictions to determine whether a horse has been administered an alkalinizing agent.
Publisher
Cambridge University Press (CUP)
Reference31 articles.
1. Composition of sweat of the horse during prolonged epinephrine (adrenaline) infusion, heat exposure, and exercise;Kerr;American Journal of Veterinary Research,1983
2. Dehydration, stress, and water consumption of horses during long-distance commercial transport.
3. Molecular characterisation of carbohydrate digestion and absorption in equine small intestine
4. Effects of concentrated electrolytes administered via a paste on fluid, electrolyte, and acid–base balance in horses;Sosa Leon;American Journal of Veterinary Research,1998
5. Blood–gas tensions and acid–base status in ponies during treadmill exercise;Parks;American Journal of Veterinary Research,1984
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