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首页> 美国卫生研究院文献>Frontiers in Veterinary Science >Environmental and Physiological Factors Associated With Stamina in Dogs Exercising in High Ambient Temperatures
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Environmental and Physiological Factors Associated With Stamina in Dogs Exercising in High Ambient Temperatures

机译：在高温环境下锻炼的犬耐力相关的环境和生理因素

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This IACUC approved study was performed to evaluate the environmental, physiological, and hematological components that contribute to stamina following successive bouts of exercise that included searching (5-min), agility (5-min), and ball retrieve (<10-min). Regularly exercised dogs (N = 12) were evaluated on five separate occasions. The population consisted of eight males and four females ranging in age from 8 to 23 months, which included six Labrador retrievers, three German shepherds, and one each English springer spaniel, German wirehaired pointer, and Dutch shepherd. The exercise period was up to 30 min with 5 min of intermittent rest between the exercise bouts or until a designated trainer determined that the dog appeared fatigued (e.g., curled tongue while panting, seeking shade, or voluntary reluctance to retrieve). At the end of the exercise period, pulse rate (PR), core temperature, blood lactate, and venous blood gas were collected. The median outdoor temperature was 28.9°C (84°F) (IQR; 27.2–30°C/81–86°F) and median humidity was 47% (IQR; 40–57%). Median duration of exercise was 27 min (IQR; 25–29). No dog showed signs of heat stress that required medical intervention. The components used to measure stamina in this study were total activity, post-exercise core body temperature (CBT), and increase in CBT. When controlling for breed, total activity, as measured by omnidirectional accelerometer device, could be predicted from a linear combination of the independent variables: pre-exercise activity (p = 0.008), post-exercise activity (p < 0.001), outdoor temperature (p = 0.005), reduction in base excess in extracellular fluid compartment (BEecf) (p = 0.044), and decrease in TCO2 (p = 0.005). When controlling for breed and sex, increase in CBT could be predicted from a linear combination of the independent variables: study day (p = 0.005), increase in PR (p < 0.001), increase in lactate (p = 0.001), reduction in BEecf (p = 0.031), increase in glucose (p = 0.044), increase in hematocrit (p = 0.032), and increase in hemoglobin (p = 0.038). This study suggests that the influence of outdoor temperature, pre- and post-exercise activity, and the metabolic parameters are important components of stamina associated with exertion.
机译：这项经IACUC批准的研究旨在评估连续几轮运动后进行耐力的环境，生理和血液学成分，这些运动包括搜索（5分钟），敏捷（5分钟）和取球（<10分钟） 。在五个不同的场合对定期运动的狗（N = 12）进行了评估。人口包括8位男性和4位女性，年龄从8到23个月不等，其中包括6只拉布拉多猎犬，3只德国牧羊犬，以及每只英国史宾格犬，德国硬毛尖犬和荷兰牧羊犬各1只。运动周期最长为30分钟，两次运动之间可间歇休息5分钟，或者直到指定的培训师确定这只狗看起来疲倦为止（例如，气喘吁吁地卷曲的舌头，寻找阴影或自愿勉强恢复）。运动结束后，收集脉搏率（PR），核心温度，血乳酸和静脉血气。室外温度中位数为28.9°C（84°F）（IQR; 27.2–30°C / 81–86°F），中部湿度为47％（IQR; 40–57％）。运动的中位数持续时间为27分钟（IQR； 25-29）。没有狗表现出需要医疗干预的热应激迹象。在这项研究中，用于测量耐力的组件包括总活动量，运动后核心体温（CBT）和CBT升高。当控制品种时，可以通过自变量的线性组合来预测通过全向加速度计设备测得的总活动：运动前的活动（p = 0.008），运动后的活动（p <0.001），室外温度（p <0.001）。 p = 0.005），细胞外液区室（BEecf）的碱基过量减少（p = 0.044）和TCO2降低（p = 0.005）。在控制品种和性别时，可以通过以下独立变量的线性组合来预测CBT的增加：研究日（p = 0.005），PR增加（p <0.001），乳酸盐增加（p = 0.001），降低BEecf（p = 0.031），葡萄糖增加（p = 0.044），血细胞比容增加（p = 0.032）和血红蛋白增加（p = 0.038）。这项研究表明，室外温度，运动前后的活动以及代谢参数的影响是与运动相关的耐力的重要组成部分。

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