无氧阈和无氧阈以上运动员左心功能

采用逐级递增负荷踏车试验测定26名运动员最大摄氧量与无氧阈并与在相应心率下二维超声心动图运动试验测得的左心室形态和机能各参数比较。左室舒末内径与(?)O_(2max)、左室泵血功能某些参数在AT和AT以上和(?)O_2有显著相关,但不同个体在相应心率下相关较低,而同一个体(或组)在整个试验过程中自身比较呈高度相关。

CARDIAC FUNCTION AT AND ABOVE ANAEROBIC THRESHOLD IN ATHLETES

Anaerobic threshold (AT) and maximal oxygen uptake (Vo_2max) were determined according to ventilation and gas exchange measurements during graded cycling in 26 athletes and were compared with cardiac condition and function measured by 2-dimensional echocardiography exercise test in corresponding with HR at and above AT. There are significant correlations between Dd and VO_2max and between cardiac function (such as SV, CO, UMO and so on) and VO_2, but the correlations are higher in the same than in different subjects of the same HR. It suggests that the physiological individualities including cardiac function and other peripheral factors are so different that the VO_2max, AT, cardiac condition and function should be measured respectively to evaluate aerobic capabilities of each athlete, thus guiding the training and selection of athletes.