普通中年人75% HRmax强度运动时心电图和血压的反应

Changes of ECG and BP in healthy middle-aged people at the 75% HRmax

目的:受试者为120名健康中年人,在递增负荷跑台实验中设定75%HRmax为靶心率,观察了他们的心电图和血压发生的变化,通过研究这一变化,探讨健身运动的时候采取这一强度进行锻炼的安全性。研究发现:当达到这一靶心率时,有10%的男性和11%的女性出现心电图S-T的异常,在休息五分钟后,异常都能够消失,运动中血压的异常率小于心电图S-T的异常率。提示75%HRmax作为中年人健身时控制运动强度的靶心率是安全的。

Objective：It takes middle-aged people（ 45 ~ 59 years old） as an example to investigate the exercise capability and the cardiovascular response in Graded Exercise Testing.We found the changes of their ECG and blood pressure at 75% HRmax. By studying these changes,it discussed the moderate intensity in their physical exercise. Results：At the 75%HRmax,the abnormal decline rate of ST segment is 10% of male and 11% of female. After5min＇s rest,these abnormal disappeared. At the 75% HRmax,the abnormal rate of blood pressure was lower than the abnormal decline rate of ST segment. Conclusion：Dynamic ECG monitor can evaluate cardiovascular risk effectively during exercise. The cardiovascular response is safe for healthy middle-aged people exercising at 75% HRmax,and it may be the reference for them to do the physical exercise.