Venous hemogasometry and blood electrolytes in Mangalarga Marchador mares submitted to aerobic training

Abstract

The Mangalarga Marchador (MM) breed, valued for its marcha pace, has been excelling in functional activities such as marcha course. Considering the lack of information about sports physiology of the marcha horses, the development of training protocols and physical testing becomes essential and, in this context, the concentrations of blood gases and electrolytes provide additional information for the monitoring of metabolic changes induced by exercise. The goal of the study was to assess the hemogasometric responses and blood electrolyte concentration in MM mares during maximal effort treadmill tests carried out before and after training (trial 1) and between a maximal effort treadmill test and an incremental field test (trial 2). The trials assessed plasma lactate concentration, blood pH, oxygen and carbon dioxide blood pressures, and blood concentrations of the ions bicarbonate, sodium (Na, and calcium (Ca ++ ). The study followed a randomized block in a split-plot design. In the first trial, the distances walked by the equines in the tests before and after training caused decrease (p<0.05) in pH and Ca ++ concentration and increase in the concentrations of K + and Na + . In the second trial, the influence of the type of test and the ambient temperature caused decrease (p<0.05) in pH and increase in the concentrations of K + and Ca ++ . After training, MM mares had greater changes in pH and electrolyte concentrations.Index terms: Equine, bicarbonate, carbon dioxide, oxygen. RESUMOA raça Mangalarga Marchador (MM), valorizada por apresentar como andamento a marcha, vem se destacando nas atividades funcionais, como as provas de marcha. Considerando a escassez de informações sobre a fisiologia esportiva dos equinos marchadores, a elaboração de protocolos de treinamento e de testes físicos torna-se fundamental e, nesse contexto, as concentrações dos gases e eletrólitos sanguíneos constituem informações adicionais para o monitoramento das alterações metabólicas induzidas pelo exercício. Objetivou-se avaliar as respostas hemogasométricas e a concentração sanguínea de eletrólitos de éguas MM, durante teste de esforço máximo em esteira, realizado antes e após o treinamento -ensaio 1 e entre um teste de esforço máximo em esteira e um teste de intensidade crescente a campo -ensaio 2. Foram avaliadas a concentração plasmática de lactato, o pH sanguíneo, as pressões sanguíneas de oxigênio e de dióxido de carbono, as concentrações sanguíneas dos íons bicarbonato, sódio (Na

Physiological Parameters in the Blood of a Murine Stress-Induced Depression Model before and after Repeated Passive Exercise

“…Immediately after the exercise session on day 3, physiological parameters in the blood were measured using the i-STAT clinical portable analyzer. The reliability of the i-STAT analyzer has previously been described [ 17 21 22 23 ]. The level of plasma lactate was slightly reduced after exercise at 12 m/min, but not at the other speeds ( Fig.…”

“…Certain physiological parameters in the blood, such as stress hormones, oxygen and carbon dioxide levels, blood pH, and lactate level may be used as important blood markers that reflect bodily responses to exercise. Plasma pH, lactate levels, and partial O 2 and CO 2 pressures in the blood may be affected by repeated exercise, particularly when exercise is undertaken at moderate to high intensities [ 15 16 17 ]. Therefore, these blood parameters may be used as important markers for the evaluation of maximal versus submaximal intensity of exercise [ 25 26 27 ].…”

“…Moreover, the exercise itself may evoke physiological and emotional stress in a certain condition. In particular, long-term submaximal exercise may cause physiological stress and induce lactate accumulation in the blood [ 15 16 17 ]. Therefore, it is necessary to understand the physiological parameters that are affected by exercise, particularly when forced exercise is applied to a stress-induced depression model.…”

Chromium or l-carnitine supplementation during an aerobic conditioning program mildly modified the energy metabolism biomarker response in Mangalarga Marchador fillies

“…The LT was used as the basis to prescribe the speed of the treadmill exercise during the conditioning period. The test protocol was adapted from Garcia et al (2013) and consisted of 10 min of warm-up (5 min at 1.7 m s À 1 and 5 min at 3.5 m s À 1 with no treadmill slope). After the warm-up, the treadmill slope was set at 3% and the progressive phase began, i.e., the speed was increased by 1 m s À 1 every three minutes.…”

Assessment of a vaquejada horse training protocol based on laboratory clinical parameters

“…Every other month, horses were subjected to a progressive effort field test for a total of six tests (Rezende et al, 2012;Garcia et al, 2013). To achieve greater standardization, the same rider was prioritized to ride the horses, always in the same order and at the same time of day.…”