PDF(Pubmed)
Abstract：
Cardiac adaptation to conditioning in horses was evaluated after empirical training based on trainers\' experience. Twelve purebred Arabian horses, aged (mean ± SD) 28.42 ± 3.75 months, which did not perform any type of exercise prior to the research, were submitted to treadmill conditioning for six weeks. The conditioning program was based on the velocity run by the horse at which the blood lactate concentration, determined in an incremental exercise test (IET), reached 2 mmol/L (V2). The velocity at which the blood lactate concentration reached 4 mmol/L (V4) was also determined. The echocardiograms were performed at rest with pulsed-wave and tissue Doppler imaging in B- and M-modes. All procedures were carried out before and after the conditioning period. The results showed increases in V2 (from 5.2 ± 0.3 to 6.7 ± 0.4 m/s) and V4 (from 5.8 ± 0.4 to 7.6 ± 0.5 m/s) (p < 0.0001). There were also increases in the left ventricle internal diameter at diastole (LVIDd), left ventricle mass (LV mass), and stroke volume (SV), while no changes were observed in the LV free wall thickness and mean and relative wall thicknesses. The conditioning protocol, which was completed by all horses, proved to be safe and efficient, as it improved the aerobic capacity of the animals. Finally, the cardiac remodeling that occurred was mainly associated with the effect of physical training.
摘要：
在根据训练员的经验进行经验性训练后，评估了马匹对条件的心脏适应性。十二匹纯种阿拉伯马，年龄（平均值±SD）28.42±3.75个月，在研究之前没有进行任何类型的锻炼，接受跑步机调理六周。调节程序基于马运行的速度，在该速度下，血液中的乳酸浓度，在增量运动测试(IET)中确定，达到2mmol/L(V2)。还测定了血乳酸浓度达到4mmol/L(V4)时的速度。超声心动图在休息时使用脉冲波和组织多普勒成像以B和M模式进行。所有程序在调节期之前和之后进行。结果显示V2(从5.2±0.3增加到6.7±0.4m/s)和V4(从5.8±0.4增加到7.6±0.5m/s)(p<0.0001)。舒张期左心室内径（LVIDd）也增加，左心室质量(LV质量),和冲程量(SV)，而LV自由壁厚以及平均和相对壁厚均未观察到变化。调节协议，这是由所有的马完成的，被证明是安全有效的，因为它提高了动物的有氧能力。最后,心脏重构的发生主要与体育锻炼的效果有关。
