Does usefulness of potassium supplementation depend on speed?

Hess, Tanja; Kronfeld, D. S.; Carter, R. A.; Treiber, K. H.; Byrd, Bridgett M.; Staniar, W.B.; Smith, Liz; Harris, Pat

doi:10.1111/j.2042-3306.2006.tb05517.x

Cited by 5 publications

(2 citation statements)

References 19 publications

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“…However, we did not find significant changes in K concentrations, and a significant correlation between K and ALD concentrations, was not observed. K is an intracellular ion and furthermore, circulating K in endurance horses is related to the time of blood extraction after cessation of exercise, and dependant on the activity of the muscle Na‐K ATP‐ase pump (Hess et al . 2006).…”

Section: Discussionmentioning

confidence: 99%

Dehydration, electrolyte imbalances and renin‐angiotensin‐aldosterone‐vasopressin axis in successful and unsuccessful endurance horses

Muñoz

Riber

Trigo

et al. 2010

Equine Veterinary Journal

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Section: Discussionmentioning

confidence: 99%

Dehydration, electrolyte imbalances and renin‐angiotensin‐aldosterone‐vasopressin axis in successful and unsuccessful endurance horses

Muñoz

Riber

Trigo

et al. 2010

Equine Veterinary Journal

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“…A decrease in hydration then leads to a reduced blood flow, followed by reduced muscle perfusion resulting in lameness and increased CK values. It is also possible that preride increased plasma values of potassium prevent further muscle cell leakage of potassium leading to muscle fatigue (51,52). Another result of increased potassium might be neuromuscular hyperexcitability, which could also result in elimination (53).…”

Section: Discussionmentioning

confidence: 99%

Age and Hydration of Competing Horses Influence the Outcome of Elite 160 km Endurance Rides

et al. 2021

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High elimination rates and the concern for horse welfare are important issues in endurance riding. An improved understanding of the causes of elimination could increase completion rates in this sport. We have identified pre-ride risk factors that allow an assessment of potential elimination before the ride. A longitudinal cohort study was performed among 49 healthy horses competing in the 160 km endurance ride at the 2016 World Championship of Endurance Riding in Samorin/Slovakia. Blood samples were drawn before the ride. For statistical evaluation, horses were categorized in three groups: finishers, lame and metabolically eliminated horses. Risk factors were calculated for each group using multinomial logistic regression. A 1% increase in hematocrit levels was associated with a higher OR for elimination (lameness: OR 1.26, p = 0.017; metabolic: OR 1.34, p = 0.010). Furthermore, increased potassium values correlated negatively with the race outcome. For a 1 mmol/l increase in potassium, the lameness OR was 4.21, p = 0.039 and metabolic OR was 1.15, p = 0.848. Eight-year-old horses had a 100% elimination rate and survival analyses showed a significantly higher hazard for elimination (p = 0.025). We thus conclude that age and hydration affect the outcome of elite endurance rides. Further investigation of age as a risk factor seems to be clinically relevant and adjustments of FEI qualification modes may be appropriate.

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Effects of Vitamin E and Selenium on Serum Trace and Major Elements in Horses

Yur

Dede

Değer

et al. 2008

Biol Trace Elem Res

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The combined effects of vitamin E and selenium were studied in native Anatolian horses subject to strenuous exercise. The concentrations of copper, zinc, iron, calcium, potassium, and magnesium were determined in serum by atomic absorption spectrometry in two study groups (n = 25 each), one of which served as untreated controls. After exercising the horses by running 1,500 m in about 7 min, only the copper level and the copper/zinc ratio significantly increased (p < 0.05), but the concentrations of calcium, potassium, iron, and magnesium remained unchanged. In horses treated with vitamin E and selenium, the calcium and potassium levels decreased to levels lower than those of untreated controls before and after exercise. The iron levels were not changed by exercise or treatment alone but increased when the horses had been supplemented and exercised. The copper level and the copper/zinc ration increased as a result of exercise in both treated and untreated horses. These changes suggest that supplementation with vitamin E and selenium had an important effect on the serum concentrations of calcium, potassium, copper, iron, and the copper/zinc ratio.

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Does usefulness of potassium supplementation depend on speed?

Abstract: Lower plasma [K+] and higher plasma [Ca++] with EM-K supplementation may help reduce the risk of conditions associated with neuromuscular hyperexcitability occurring especially during higher speeds in endurance races.

Cited by 5 publications

References 19 publications

Dehydration, electrolyte imbalances and renin‐angiotensin‐aldosterone‐vasopressin axis in successful and unsuccessful endurance horses

Dehydration, electrolyte imbalances and renin‐angiotensin‐aldosterone‐vasopressin axis in successful and unsuccessful endurance horses

Age and Hydration of Competing Horses Influence the Outcome of Elite 160 km Endurance Rides

Effects of Vitamin E and Selenium on Serum Trace and Major Elements in Horses

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