Effects of supplementation with Saccharomyces cerevisiae and aerobic training on physical performance of Mangalarga Marchador mares

The objective of this study was to assess the effects of supplementation with Saccharomyces cerevisiae on the performance of Mangalarga Marchador equines and to verify the effectiveness of the aerobic training protocol adopted. The study used 14 Mangalarga Marchador mares in a completely randomized split-plot design. The plots were made up of two treatments (groups Probiotic and Control) and the split plots comprised two maximal-effort physical tests applied both before and after the six weeks of training. The animals' spirometric parameters, heart rate, and plasma lactate levels were assessed. No difference was found between the Probiotic and Control groups in any of the parameters assessed. A difference was found in the physical tests for time-to-fatigue, aerobic and anaerobic thresholds, speed at which plasma lactate levels reached 2 and 4 mmol/L, speed at which the heart rate reached 200 bpm, and the lactate level at 30 min of the recovery period. Supplementation with Saccharomyces cerevisiae has no effect on physical conditioning of Mangalarga Marchador mares and the aerobic training protocol adopted increases the animals' aerobic and anaerobic capacity.

本研究旨在评估补饲酿酒酵母（Saccharomyces cerevisiae）对曼加尔加马查多马（Mangalarga Marchador equines）运动表现的影响，并验证所采用的有氧训练方案的有效性。本研究采用完全随机裂区设计，选取14头曼加尔加马查多母马作为实验对象。主区设置两个处理组（益生菌组与对照组），裂区小区则包含两次力竭性体能测试，分别在6周训练周期的前后进行。研究测定了受试动物的肺量计参数、心率及血浆乳酸水平。结果显示，益生菌组与对照组在所有测定参数上均无显著差异。但在疲劳时间、有氧与无氧阈值、血浆乳酸浓度达到2mmol/L和4mmol/L时的运动速度、心率达到200次/分钟时的运动速度，以及恢复期30分钟时的乳酸水平这些体能测试指标中，两组存在显著差异。综上，补饲酿酒酵母对曼加尔加马查多母马的体能无显著改善作用，而本次采用的有氧训练方案可提升受试动物的有氧与无氧代谢能力。