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12名世居海拔1895m的男性青年,在平原地区减压舱进行阶梯式间断性缺氧复合体育锻炼。在模拟海拔4000m锻炼结束时与平原相比,PEP/LVET(左室射血前期/射血期)比值不变;心率减慢,静息时心搏量增加,左室舒张末容积和左室心肌量增加;血中红细胞稍增多,血红蛋白增加;PWC_(170)(心率在170次时的作功量)明显增加,返回平原7天后,PWC_(170)仍然超过对照值。以上结果表明,在阶梯式间断缺氧条件下进行体育锻炼,可以促进机体对缺氧的适应,增加机体摄取和利用氧的能力。
Twelve male youths, living at an altitude of 1895m, performed stepwise intermittent anoxia combined physical exercises in the decompression cabin in the plain area. PEP / LVET (left ventricular ejection fraction / ejection fraction) unchanged at the end of simulated 4000 m altitude training; heart rate slowed; stroke volume increased at rest; left ventricular end diastolic volume and left ventricular The amount of erythrocytes increased slightly and the hemoglobin increased. The PWC_ (170) (heart rate at 170 times) increased obviously. After returning to plain for 7 days, PWC_ (170) still exceeded the control value. The above results show that, in the step-down anoxia conditions of physical exercise, can promote the body’s adaptation to hypoxia, increase body’s ability to take in and use of oxygen.