Effect of Competition on Nitric Oxide, Carbon Monoxide, and Cyclic Guanosine Monophosphate Levels in Training Horses

Marañón, Gonzalo; Muñoz-Escassi, Bárbara; Manley, William; Garcı́a, Cruz; León, Rosa; Olábarri, Begoña; Cayado, Patricia; Domínguez, C. Sacramento; Muela, Mercedes Sánchez de la; Suárez, Mauricio; Vara, Elena

doi:10.1016/j.jevs.2009.07.004

Cited by 1 publication

(3 citation statements)

References 29 publications

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“…2009), which is similar to what was found in the current study. In contrast to the current study, Maranon et al . (2009) found NO to increase in horses after a jumping competition and not change in dressage horses after competition.…”

Section: Discussioncontrasting

confidence: 99%

“…In contrast to the current study, Maranon et al (2009) found NO to increase in horses after a jumping competition and not change in dressage horses after competition. The jumping competition in that study could be a similar effort to that undergone by the horses running the interval exercise test in the Lamprecht et al (2009) study, which also showed an increase in NO.…”

Section: Inflammatory Markerscontrasting

confidence: 99%

“…However, the dressage horses may have undergone more similar intensity exercise to the graded exercise test where no change was found. The difference found in NO response by Maranon et al . (2009), may be explained by the fact that the showjumping horses studied were probably not undergoing the same level of intensity when compared to horses in the current study.…”

Section: Discussionmentioning

confidence: 61%

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Nutrient intake during an elite level three‐day event competition is correlated to inflammatory markers and antioxidant status

Williams¹,

Burk

2010

Equine Veterinary Journal

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SummaryReasons for performing study: Dietary intake and feeding management practices could affect the degree of physiological stress and subsequent performance of high level 3-day event horses. Objectives: To assess whether a relationship exists between dietary intake levels of selected nutrients and the inflammatory and antioxidant status in horses competing in a high level 3-day event. Materials and methods: Riders competing in a CCI2*/CCI3* 3-day event (n = 35) answered a nutritional management survey conducted by the investigators at the competition. Actual and recommended intakes of vitamin E, potassium (K), calcium (Ca), phosphorus (P) and magnesium (Mg) were calculated using the manufacturer or NRC values. Blood samples, bodyweight and body condition score of horses were taken precompetition, 30 min and 18-24 h after crosscountry, but before stadium jumping. Data were analysed using a mixed model ANOVA with repeated measures and Pearson's product moment correlation. Results: Estimated daily intakes of vitamin E, K, Ca, P and Mg for horses were higher than daily recommended levels (P<0.05). In response to competition, tumour necrosis factor-a (TNFa; P = 0.0002), nitric oxide (NO; P = 0.013) and b-carotene (BC; P<0.0001) decreased, creatine kinase (P<0.0001) and aspartate aminotransferase (P = 0.001) increased, and a-tocopherol and retinol did not change. Intake of vitamin E, K, Ca, P and bodyweight were negatively correlated with TNFa (P<0.05). Vitamin E and bodyweight were also negatively correlated with NO (P<0.05). Pasture intake and BC were positively correlated (P<0.0001). Conclusions: The decline in systemic inflammatory markers is probably due to increased utilisation or excretion and decreased production related to the increased oxidative stress experienced by horses during competition. High bodyweights could also predispose horses to a higher level of inflammation during 3-day event competition.

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Section: Discussioncontrasting

confidence: 99%

Section: Inflammatory Markerscontrasting

confidence: 99%

Section: Discussionmentioning

confidence: 61%

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