Effects of dietary cation-anion balance on blood parameters in exercising horses

Stutz, W.A.; Topliff, D.R.; Freeman, D.W.; Tucker, W.B.; Breazile, J.W.; Wall, D.L.

doi:10.1016/s0737-0806(06)81474-7

Cited by 18 publications

(14 citation statements)

References 4 publications

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“…Baker et al (1992) in that horses consuming anionic diets tended to be acidotic while horses consuming cationic diets tended to be alkalotic at rest. Also, for blood acid-base parameters post anaerobic work, data in this trial tended to agree with Stutz et al (1992) and Milne (1974) as horses performing anaerobic work experienced an incompletely compensated metabolic acidosis.…”

Section: Urinary Calcium Excretionsupporting

confidence: 84%

Effects of dietary cation-anion balance on acid base balance and blood parameters in anaerobically exercised horses

Popplewell¹,

Topliff²,

Freeman³

et al. 1993

Journal of Equine Veterinary Science

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Section: Urinary Calcium Excretionsupporting

confidence: 84%

Effects of dietary cation-anion balance on acid base balance and blood parameters in anaerobically exercised horses

Popplewell¹,

Topliff²,

Freeman³

et al. 1993

Journal of Equine Veterinary Science

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“…Subsequent to glycolysis, the decarboxylation of pyruvate to acetyl CoA by pyruvate dehydrogenase results in the production of 1 mol of CO 2 for each mole of pyruvate entering the TCA cycle. Stutz et al (1992) 7 also found an increase in venous pCO 2 1 h after both the morning and evening feeding of a mixed grain and hay meal. Exercise during the sampling day may have had a confounding effect in the Stutz et al (1992) 7 study, however, leading to increased need for glucose oxidation (compared to resting horses), and thus an increase in CO 2 generation.…”

Section: Independent Variablesmentioning

confidence: 76%

“…A post-feeding acidosis has been demonstrated previously; however, the results of the present study suggest that the time of day should be considered when interpreting equine feed studies. Stutz et al (1992) 7 [18][19][20], these were designed to determine the chronic effect of varying the DCAB on pH, and thus did not emphasize or discuss the significance of the acute [H þ ] responses to meal consumption. However, it appears that, although the chronic feeding of a low versus high DCAD diet resulted in a chronically higher plasma [H þ ], acutely the feeding of both low and high DCAD diets initially results in similar changes in…”

Section: Dependent Variablesmentioning

confidence: 99%

“…Kerr and Snow (1982) 6 demonstrated that plasma protein concentration ([PP]) and haematocrit (Hct) were increased, indicating an acute fluid shift, and plasma [K þ ] was decreased in response to a single feeding of a mixed grain and hay ration. Stutz et al (1992) 7 determined that the feeding of a 60% concentrate:40% hay ration resulted in a decrease in pH and an increase in pCO 2 1 h post-feeding. Clarke et al (1988) 8 fed horses their entire 24-h ration of forage and concentrate in a single feeding and reported significant increases in serum [PP] and [Na þ ] and decreases in [K þ ] between 0.5 and 2 h post-feeding.…”

Section: Introductionmentioning

confidence: 99%

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Cyclical plasma electrolyte and acid–base responses to meal feeding in horses over a 24-h period

Waller

Smithurst

Ecker

et al. 2005

Equine Comp. Exerc. Physiol.

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I Lindinger (2005). Cyclical plasma electrolyte and acid-base responses to meal feeding in horses over a 24-h period. Equine and Comparative Exercise Physiology, 2, pp 159-169 AbstractThe present study used the physicochemical approach to characterize the changes in plasma electrolyte and acidbase states that occur in horses in response to feeding. Jugular venous blood was sampled every 0.5-2 h over a 24h period from two groups (n ¼ 4 and n ¼ 5) of Standardbreds fed a mixed hay and grain ration at 8 am and 7 pm. One group of horses was studied in October, and one in December. The time course and magnitude of feeding responses differed between groups, and between the morning and evening meals. Feeding-induced changes in plasma electrolyte and acid-base variables occurred rapidly, within the first 1-3 h of meal consumption. The plasma acidosis associated with eating the meal was marked by increased plasma [H þ ] and decreased TCO 2 . The primary contributors to the increases in plasma [H þ ] were the decrease in the plasma concentration of strong ions ([SID]) and the pCO 2 . The increase in plasma total weak acid (protein) concentration ([A tot ]) post-feeding had only a minor effect on the acid-base state. The feeding-induced acidosis abated 3-6 h after the meal, showing cyclical recovery of physicochemical variables that contributed to the acid-base disturbance. It is concluded that several key plasma electrolyte and acid-base parameters undergo significant, cyclical fluctuations in response to feeding in horses.

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“…An increase in glycolytic activity post-feeding may account for the increased PCO 2 during early recovery, as Stutz et al 24 also found an increase in venous PCO 2 1 h after the feeding of a mixed hay and grain meal following exercise.…”

Section: Independent Variablesmentioning

confidence: 95%

Electrolyte supplementation after prolonged moderate-intensity exercise results in decreased plasma [TCO₂] in Standardbreds

Waller

Heigenhauser

Lindinger

2007

Equine Comp. Exerc. Physiol.

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Link to this article: http://journals.cambridge.org/abstract_S1478061507890086How to cite this article: Amanda Waller, George J Heigenhauser and Michael I Lindinger (2007). Electrolyte supplementation after prolonged moderate-intensity exercise results in decreased plasma [TCO2] in Standardbreds. Equine and Comparative Exercise Physiology, 4, pp 149-158 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 21 decreased plasma [TCO 2 ] during the recovery period as compared with control. The primary contributor to the decreased [TCO 2 ] with electrolyte supplementation was a decreased strong ion difference ([SID]), as a result of the non-significant increase in plasma [Cl 2 ]. 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 ([A tot ]). 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 [TCO 2 ], which is of significant practical interest to the horse racing community, as a testing threshold of greater than 37 mmol l 21 is used by many racing jurisdictions to determine whether a horse has been administered an alkalinizing agent.

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Effects of dietary cation-anion balance on blood parameters in exercising horses

Cited by 18 publications

References 4 publications

Effects of dietary cation-anion balance on acid base balance and blood parameters in anaerobically exercised horses

Effects of dietary cation-anion balance on acid base balance and blood parameters in anaerobically exercised horses

Cyclical plasma electrolyte and acid–base responses to meal feeding in horses over a 24-h period

Electrolyte supplementation after prolonged moderate-intensity exercise results in decreased plasma [TCO₂] in Standardbreds

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