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对12名世居在1895米高原的男性自行车运动员,经过低压缺氧复合运动锻炼后作了超声心动图检查。在低压舱内运动员完成间断缺氧运动锻炼后,他们的右心室和右肺动脉内径随着高原高度和运动时间增加而增加。在摸拟高原4000米与平原相比,安静的心搏量和心输出量,左心室内径和左心室心肌量明显增加,室间隔和左室后壁的厚度也增厚。这些变化是在生理范围内,因此应属于对高原运动训练的适应变化。在摸拟4000米高原动运后心搏量和心输出量的增加比3000米明显,在缺氧运动训练中没有一个受试者发生急性高山病,这些结果表明阶梯式间断缺氧复合运动锻炼方法可能改善心脏功能和增加对缺氧的适应能力。
12 male cyclists living in the 1895-meter plateau underwent echocardiography after hypobaric hypoxia combined exercise. After low-pressure cabin athletes completed intermittent anoxia exercise, their right ventricle and right pulmonary artery diameter increased with altitude and exercise time. Compared with the plain, the quiet stroke volume and cardiac output, left ventricular diameter and left ventricular mass increased significantly at 4,000 meters altitude and the thickness of ventricular septum and left ventricular posterior wall also thickened. These changes are within the physiological range and should therefore be adapted to changes in altitude training. After simulating a 4000-meter plateau movement, the increase in stroke and cardiac output was more pronounced than 3000 meters, with none of the subjects developing acute mountain sickness during hypoxic exercise training. These results suggest that stepwise intermittent anoxia exercise Methods may improve cardiac function and increase the ability to adapt to hypoxia.