从数量的特征来看，它表示的是一种极量。
As to the features of quantity, it manifests a kind of maximum quantity.
目的：探讨次极量平板运动试验检查对冠心病早期诊断的价值。
Objective: Discusses the secondary quantity treadmill exercise test to inspect to the coronary heart disease early time diagnosis value.
在次极量仰卧运动中测量最大心率、心率血压双乘积、最大运动耐量指数。
Maximal heart rate (MHR), double product of maximal heart rate and systolic blood pressure, and maximal endurance index (MEI) were measured during submaximal supine bicycle exercise.
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