【摘要】 中国国家集训队12名越野滑雪运动员于长白山进行为期三周高原训练。本文报道了应用彩色多普勒测试和观察高原训练对运动员左室功能的影响。分析比较高原训练前后测试结果显示,运动员安静时心搏量(SV)、心输出量(CO)、左室射血分值(EF)、短轴缩短率(ES)以及左室容积(EDV、ESV)均有显著变化,但组间差异较大。其特点是:男子组以增强左室收缩为主,呈力量型改变。文章指出,高原训练高度和训练手段对于左心功能改变有密切关系。认为在海拔2300—2500米高度、突出强度训练可能趋向力量型改变;在1600—1800米高度、突出耐力训练可能趋向容积型改变。更多还原

【Abstract】 12 cross-country skiers from Chinese National Skiing Team underwent altitute training for 3 weeks on Changbai Mountain. The effect of the altitute training on left ventricular (LV) function of the skiers usingColor Doppler Flow lmaging technique was presented in this paper. Comparison of the data from the skiers before and after altitute training showed significant alterationsin stroke volume (SV), cardiac output (CO), ejection fraction (EF), functional shortening (FS) and LVvolumes (EDV and DSV). LV function of male skiers after the training was characterized by enhancementof systolic efficiency (power type): increases in EF and FS. and decrease in EDV: whereas in famale skiersby changes in LV volumes (volumetric type): increases in SV, CO and EDV. In power type alteration,usually there were no any changes in SV and CO at rest, however, due to imporvement of cardiac reserveand ability to overcome afterload, cardiac output could reach a relatively higher level during exercise. Involumetric type alteation, although SV and CO at rest increased, while cardiac output improved insignificantly during exercise because of slight improvement of cardiac contractility and LV ejection power to overcome afterload. Thus, it was considered that the power type was the important effect of altitute training on LV function. The altitute and training program were closely related to LV function alteration. At 2300-2500 M above sea level, with training program mainly composed of intensity the alteration tended to be power type and at 1600-1800 M above sea level, with mainly endurance training the alteration tended to be volumetric type.更多还原