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首页> 外文期刊>International Journal of Biometeorology: Journal of the International Society of Biometeorology >The effect of 'living high-training low' on physical performance in rats
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The effect of 'living high-training low' on physical performance in rats

机译：“低强度锻炼”对大鼠身体机能的影响

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In this research, we hypothesized that, in rats, adaptation to high altitude (2500 m) plus training at low altitude (610 m), "living high-training low", improves physical performance at low altitude more than living and training at low altitude (610 m). Rats were divided into four groups: (1) living at low altitude (LL, n=12), (2) living and training at low altitude (LLTL, n=13), (3) living at high altitude (LH, n=12), (4) living at high altitude and training at low altitude (LHTL, n=13). The program for living at high altitude involved raising rats under hypobaric hypoxia (equivalent to 2500 m), and the training program consisted of running on a tread- mill at low altitude. All groups were raised at each altitude and trained to run at 35 m/min for 40 min/day, 6 days/week for 6 weeks. During this program, we measured heart rates both at rest and during exercise, and performed running-time trials. The mean heart rate during exercise was lower in groups with training than in groups without training, and the groups receiving training could run longer than the untrained groups. The LHTL group especially showed the lowest mean heart rate during exercise and the longest running time among all groups. After 6 weeks of the training program, all rats had a catheter implanted into the carotid artery, and the mean systemic arterial pressure was continuously measured during treadmill running. The rate of increase of this pressure as the running intensity increased was lower in groups with training than in groups without training, especially in the LHTL group. Finally, we anesthetized all the rats and extracted both the right and left ventricles, and the triceps surae and liver. Training increased the weight of the left ventricle, triceps surae, and liver. The increase in weight of the left ventricle and triceps surae was higher in the LHTL group than in the LLTL group in particular. It appeared that living high- training low may be an effective strategy to improve performance ability at low altitude.
机译：在这项研究中，我们假设，在大鼠中，对高海拔（2500 m）的适应以及在低海拔（610 m）的训练，即“低处高训练”，比低处生活和训练对低身运动的改善更大。高度（610 m）。大鼠分为四组：（1）低海拔生活（LL，n = 12），（2）低海拔生活和训练（LLTL，n = 13），（3）高海拔生活（LH，n = 12），（4）高海拔生活，低海拔训练（LHTL，n = 13）。在高海拔地区生活的计划包括在低压低氧（相当于2500 m）下饲养大鼠，而训练计划包括在低海拔地区的跑步机上跑步。所有组都在每个海拔高度抬高，并训练以35 m / min的速度跑40分钟/天，每周6天，持续6周。在该计划期间，我们测量了休息和运动期间的心率，并进行了跑步时试验。有运动训练的组的运动平均心率比没有运动训练的组低，接受训练的组的运动心率可能比未经训练的组长。 LHTL组在所有运动组中尤其表现出最低的运动平均心律和最长的跑步时间。经过6周的训练计划，所有大鼠的颈动脉均植入了导管，跑步机运行期间连续测量了平均全身动脉压。随训练强度的增加，这种压力随跑步强度增加的速率要比未经训练的组低，尤其是在LHTL组中。最后，我们麻醉所有大鼠，并提取左右心室以及肱三头肌和肝脏。训练会增加左心室，肱三头肌和肝脏的重量。特别是在LHTL组，左心室和肱三头肌的重量增加高于LLTL组。看来，高训练低位生活可能是提高低海拔运动能力的有效策略。

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