双倍二级梯运动试验(以下简称双倍运动试验)应用于临床作为早期“冠心病”诊断方法,已普遍采用。但是,由于受检者的职业、平时劳动强度不同,对其阳性检出率有很大影响。双倍运动试验,相当于日常中等活动量,特别是对于体力劳动者,运动后,心率增加不显著。如运动后心率达不到 Double two ladder exercise test (hereinafter referred to as double exercise test) used in clinical as early “coronary heart disease” diagnostic methods, has been widely used. However, due to the occupation of the subject, usually different labor intensity, the positive detection rate has a significant impact. Double exercise test, equivalent to the daily moderate activity, especially for manual workers, exercise, the increase in heart rate was not significant. Such as heart rate after exercise less than