Blood Lactate Responses to Submaximal Field Exercise Tests in Thoroughbred Horses

Davie, Allan J; Evans, David

doi:10.1053/tvjl.1999.0420

Cited by 46 publications

(38 citation statements)

References 8 publications

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“…Portanto, uma análise criteriosa deve ser feita sempre levando em consideração o nível de intensidade e duração impostos no exercício físico. Ainda relacionando a produção de lactato plasmático com a intensidade do exercício, Davie & Evans (2000) citaram que em provas com distância de até 800m, semelhante ao percurso percorrido pelo equinos na prova de laço em dupla, os valores de lactato plasmático atingem 4 a 19mmol/L após o exercício, sendo o aumento da concentração de lactato proporcional à intensidade da atividade física. Dentro deste intervalo encaixa-se o valor médio registrado no presente estudo.…”

Section: Discussionunclassified

Lactacidemia e concentrações séricas de aspartato aminotransferase e creatinoquinase em equinos da raça Quarto de Milha usados em provas de laço em dupla

Caiado

Pissinate²,

Souza

et al. 2011

Pesq. Vet. Bras.

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452Pesq. Vet. Bras. 31(5): 452-458, maio 2011 RESUMO.-O presente estudo teve por objetivo avaliar a influência do exercício físico de alta intensidade e curta duração (provas de laço em dupla) sobre a lactacidemia e as concentrações séricas de aspartato aminotransferase (AST) e creatinoquinase (CK) em equinos durante competição realizada no estado do Espírito Santo. Para tal foram obtidas amostras de soro e plasma de 20 equinos, da raça Quarto de Milha ou mestiços, em três momentos assim definidos: no repouso, uma semana antes da prova atlética, já com o animal em treinamento (T0); antes da prova atléti-ca (T1) e imediatamente após o término da mesma (T2). As referidas amostras foram encaminhadas ao Laboratório Clí-nico do Centro Universitário Vila Velha (UVV) para as análi-ses. Na avaliação da lactacidemia, os resultados registrados nos momentos T0, T1 e T2 foram, respectivamente, de 0,49±0,24mmol/L, 0,93±0,16mmol/L e 9,86±2,09mmol/L. Na avaliação da atividade sérica de AST, os resultados registrados nos momentos T0, T1e T2 foram, respectiva- The aim of the present study was to evaluate the effects of high intensity and short duration physical exercise (roping team competition) on plasma lactate and serum AST and CK concentrations in horses during competition at Espírito Santo state, Brazil. Blood samples were obtained from 20 Quarter Horses, or cross-bred, in three moments: (1) at rest, one week before the competition, with the animals being trained, (2) just before the competition, and (3) immediately after the exercise. The samples were sent to Laboratório Clínico do Centro Universitário Vila Velha for analysis. Plasma lactate concentrations were 0.49±0.24mmol/L, 0.93±0.16mmol/L e 9.86±2.09mmol/L, respectively, on the moments rest and immediately before and after the exercise. Serum concentrations of AST were 189.1±43.6 IU/L, 210.2±46.7 IU/L e 173.1±33.5 IU/L, respectively, on the moments rest and immediately before and after the exercise. Finally, serum concentrations of CK were 110.9±35.2 IU/L, 51.8±15.4 IU/L and 88.2±33.5 IU/L, respectively, on the moments rest and immediately before and after the exercise. Results showed that the imposed physical exercise leaded to a significant elevation of plasma lactate and serum CK without alteration on AST. It was possible to conclude that horses were adapted to the level of exercise performed.

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Section: Discussionunclassified

Lactacidemia e concentrações séricas de aspartato aminotransferase e creatinoquinase em equinos da raça Quarto de Milha usados em provas de laço em dupla

Caiado

Pissinate²,

Souza

et al. 2011

Pesq. Vet. Bras.

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“…The calculations of v 2 and v 4 are based on the fit of an exponential curve (Valette et al 1991;Davie and Evans 2000) that has a shallow slope at lower speeds. Because of this, the velocity that elicits a [LA] of 2 mmol/l may vary.…”

Section: Discussionmentioning

confidence: 99%

A lactate‐guided conditioning programme to improve endurance performance

Trilk

Lindner

Greene

et al. 2002

Equine Veterinary Journal

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SummaryBlood lactate measurements are used widely in horses to assess athletic performance, but there are few published data on using lactate as a guide for endurance improvement. The velocity at which blood lactate concentration ([LA]) of 4 mmol/l is reached (v 4 ) is widely used to determine fitness. In an earlier study of v 4 , exercise at low intensities for longer duration was more effective at improving endurance than shorter, higher intensities. However, the prescription was unchanged during the study (6 weeks). We hypothesised that, to produce greater improvement in v 4 in the same time frame, it is necessary to adjust conditioning regimes more frequently. Six horses underwent an initial treadmill-based standard exercise test (SET). A regression analysis [LA]-speed relationship was used to calculate v 2 . Horses were then conditioned for 45 min at their calculated v 2 3 times/week (6% incline). Every 2 weeks the horses performed an SET to evaluate the v 2 conditioning protocol which ended with SET 4. Mean v 4 increased 17% from SET 1 to SET 4 (P = 0.003; 5.8 ± 0.3 to 6.8 ± 0.4 m/s). This study demonstrates that a lactate-guided conditioning programme can significantly enhance endurance performance over a 6-week time peroid when the conditioning protocol is adjusted every 2 weeks based on v 4 improvement.

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“…Recent studies (Williams et al, 2009;Mirian and Fernandes, 2011;Munsters et al, 2014) have focused on the evaluation of jumping techniques and the level of fatigue in jumper horses. Alternative methods for assessing the fitness level consist of single-step exercise tests and the monitoring of blood lactate (BL) following exercise, reflecting changes in fitness over time (Davie and Evans, 2000). Overall, a field exercise test typically consists of several incremental bouts of exercise during which HR, BL and speed are assessed (Couroucé et al, 2002;Piccione et al, 2010Piccione et al, , 2013.…”

mentioning

confidence: 99%

Application of a combined global positioning and heart rate monitoring system in jumper horses during an official competition — A preliminary study

Bazzano

Giudice

Rizzo

et al. 2016

Acta Veterinaria Hungarica

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The aim of this study was to investigate whether a combined global positioning system (GPS)/heart rate (HR) monitoring system is a valuable tool to assess, step by step, the physiological response of HR and its relationship with speed in healthy horses competing in an official show jumping class. Six mares performing a standardised warm-up and jumping course were monitored using a HR/GPS device. Venous blood lactate (BL), assessed before and after exercise, showed a significant increase (P = 0.0004) following the physical effort. One-way analysis of variance (ANOVA) showed significant changes in HR throughout the experimental period. The analysis of HR data recorded during the warm-up jumping stage showed significantly higher HR (P = 0.001) in the recovery period compared to the related jumping phase. Shifting the fence height from 100 cm to 125 cm during the warm-up jumps was also found to cause a significant increase (P = 0.016) in HR. According to these preliminary results, the simultaneous logging of heart rate and speed has the potential to be a reliable and powerful technique for field testing that can help in the monitoring of the horse's response to jumping effort during training and competition.

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Blood Lactate Responses to Submaximal Field Exercise Tests in Thoroughbred Horses

Cited by 46 publications

References 8 publications

Lactacidemia e concentrações séricas de aspartato aminotransferase e creatinoquinase em equinos da raça Quarto de Milha usados em provas de laço em dupla

Lactacidemia e concentrações séricas de aspartato aminotransferase e creatinoquinase em equinos da raça Quarto de Milha usados em provas de laço em dupla

A lactate‐guided conditioning programme to improve endurance performance

Application of a combined global positioning and heart rate monitoring system in jumper horses during an official competition — A preliminary study

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