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目的:探讨主观用力感觉(RPE)在预测急性期后心梗患者(PMIP)对运动的生理和临床反应中的作用,这将有利于适宜运动强度的制定。方法:46名服用β阻断剂的男性PMIP(年龄60.9±7.5岁)5,5名未服用β阻断剂的男性PMIP(年龄63.6±7.3岁)在活动跑台上进行递增负荷实验,终止实验的标准依美国运动医学会的指南(ACSM)或病人的主观要求。运动中每30 s测量一次摄氧量(VO2)和通气量(VE)、每3 min记录一次心率(HR),血乳酸(BL)和主观用力感觉(RPE),并连续监测12导心电图。结果:两组病人在VO2,BL,VE和ST段降低与RPE的关系方面无显著差异(P>0.05)。然而,在运动实验过程中,两组病人在心率方面有显著差异(P<0.01)。无论是服用还是未服用β阻断剂的PMIP,RPE达到13都是其运动中有氧代谢向无氧代谢过渡的转折点。结论:基于以上结果,建议PMIP在运动心脏康复中感觉到“稍费力”时即不应再加大运动强度。
OBJECTIVE: To investigate the role of subjective feeling of force (RPE) in predicting the physiological and clinical responses to exercise after acute phase of myocardial infarction (PMIP), which is beneficial to the development of appropriate exercise intensity. METHODS: Forty-six men with PMIP (age 60.9 ± 7.5 years) taking beta blockers and 5 and 5 men without PMBs (mean age 63.6 ± 7.3 years) underwent an incremental load test on a treadmill and terminated The standard of the experiment is based on the guidelines of the American College of Sports Medicine (ACSM) or the patient’s subjective requirements. VO2 and VE were measured every 30 seconds during exercise. Heart rate (HR), blood lactate (BL) and subjective force perception (RPE) were recorded every 3 minutes. The 12-lead electrocardiogram was monitored continuously. Results: There was no significant difference in the relationship between VO2, BL, VE, ST segment and RPE in the two groups (P> 0.05). However, during the exercise test, there was a significant difference in heart rate between the two groups (P <0.01). Whether PMIP was taken or not taken with beta blocker, RPE up to 13 was a turning point in the transition of aerobic metabolism to anaerobic metabolism during exercise. Conclusions: Based on the above results, it is suggested that PMIP should not increase the intensity of exercise when feeling “Slightly Exhausted” in exercise heart rehabilitation.