有氧锻炼引起的心率动力学变化的近似熵分析  

Approximate Entropy Analysis of Changes in Heart Rate Dynamics Associated with Aerobic Training.

作　　者：张志远[1] 张立藩[1] 王守岩[1] 郑军[1] 

机构地区：[1]第四军医大学航空生理学教

出　　处：《航天医学与医学工程》1997年第5期344-348,共5页Space Medicine & Medical Engineering

摘　　要：为研究有氧锻炼对心率动力学的影响，采用近似熵（ＡｐＥｎ，ａｐｐｒｏｘｉｍａｔｅｅｎｔｒｏｐｙ）方法对大学生有氧锻炼前、后及中长跑运动员的心率变异性（ＨＲＶ）信号进行了分析，并与相同条件下的时域分析及谱分析结果进行了比较。结果表明：６个月有氧锻炼引起大学生心率动力学一定改变，锻炼后在仰卧状态及ＬＢＮＰ作用下，其ＲＲ间期序列的ＡｐＥｎ值均较锻炼前显著降低（Ｐ＜０．０１，Ｐ＜０．０５）。中长跑运动员组在仰卧状态及ＬＢＮＰ作用初期，ＲＲ间期序列的ＡｐＥｎ值亦均显著低于大学生组有氧锻炼前的各相应值（Ｐ＜０．０１，Ｐ＜０．０５）。大学生组在－６．６７ｋＰａ／３０ｍｉｎＬＢＮＰ作用期间，ＨＲＶ信号的ＡｐＥｎ值均随作用时间呈线性持续降低变化（Ｐ＜０．０１）。但常规的时域及频域分析却不能区分出上述这些差别。结果提示：有氧锻炼可使ＨＲＶ信号的复杂度降低，而且在ＬＢＮＰ作用期间心率调节的同步化过程是持续进行的。To elucidate the effects of aerobic training on heart rate dynamics,heart rate variability (HRV) of eight students before and after a six-month aerobic training and HRV of six athletes,were analyzed with conventional time and frequency domain methods as well as with the approximate entropy(ApEn).The results showed that after a six-month aerobic training,heart rate ApEn significantly decreased(P<0.01,P<0.05) during both supine control and -6.67kPa/30min lower body negative pressure(LBNP).The heart rate ApEn of the athletes during supine control and early stage of LBNP testing was significantly lower(P<0.01,P<0.05) than that of the students before training.It was found that the values of ApEn were negatively correlated with the duration of LBNP in the student group(P<0.01).Howerer,both the time and frequency domain analyses were unable to detect the aforementioned changes.The results suggest that aerobic training can decrease the complexity of heart rate dynamics,and the synchronization in heart rate control during LBNP is probably a sustained process.

关 键 词：近似熵 有氧锻炼 心率变异性 下体负压 

分 类 号：R331.31[医药卫生—人体生理学] G804.21[医药卫生—基础医学]