運動時におけるリアルタイムでの心拍変動解析に基づく至適運動強度の決定

概要

論文の詳細を見る
The purpose of the present study was to develop a new method that enables individualized determination of the optimal exercise intensity for health promotion. Our study was based on the following observations : (l) physical activity at ventilatory threshold (VT) has been useful for enhancing physical fitness and even improving medical conditions such as heart failure, hypertension and diabetes, (2) exercise intensity at VT is characterized by suppressed vagal activity, and (3) vagal activity can be evaluated by analyzing heart rate variability (HRV). In the first study we defined a criteria for determining the exercise intensity corresponding to VT using HRV analysis (heart rate variability threshold, THRV). In 16 normal subjects, a time series of ECG RR interval were recorded and the means of the sum of the squared differences in successive RR intervals (MSSDs) were calculated during a ramp exercise test with a cycle ergometer. Based on the values of MSSD and the differences in successive MSSDs (ΔMSSD) at the intensity of VT, we defined the criteria of T_HRV as follows : MSSD<25 msec^2 and ΔMSSD < 6 msec^2. Another exercise test with a cycle ergo-meter was performed to evaluate the relationship between THRV and VT in 63 normal subjects. Heart rate (HR) and oxygen uptake (VO_2/wt) at T_HRV were 111.8+13.2 beats/min and 15.2+4.4 ml/kg/min, and HR and VO_2/wt at VT were 116.2 + 11.6 beats/min and 16.5 + 3.7 ml/kg/min, respectively. There was a significant correlation between T_HRV and VT (HR : r=0.82, p<0.001, VO_2/w:r=0.88, p<0.001). Thus, T_HRV and VT provided almost identical exercise intensities. As a result, we propose that, similar to VT, T_HRV can be used as an indicator of the optimal exercise intensity suitable for health promotion in normal subjects. (Jpn. J. Phys. Fitness Sports Med. 2003, 52 : 295-304)
日本体力医学会の論文
2003-06-01

運動時におけるリアルタイムでの心拍変動解析に基づく至適運動強度の決定

スポンサーリンク

概要

著者

関連論文

スポンサーリンク