12周运动干预对40~49岁男性安静时心率变异性的影响

The Effect of 12-week Exercise Intervention on the Resting HRV of Chinese Men Aged 24 to 49

目的：探寻改善40~49岁男性安静时HRV的最佳运动干预方式。方法：将40~49岁男性受试对象随机分为3组：对照组（n=9）、小量组（n=7）、大量组（n=8）,进行为期12周不同运动耗能量（1200kal/wk或2000kcal/wk）的运动干预。运动干预前后使用Omegawave测试系统测试各组受试者安静时HRV时域指标：正常窦性R-R间期的标准差（SDNN）、相邻N-N间期差值均方根值（RMSSD）、相邻间期差值的标准差（SDSD）、相邻NN之差〉50ms的个数占总窦性心搏个数的百分比（PNN50）;HRV频域指标：总功率（TP）、高频率范围内的功率（HF）、低频率范围内的功率（LF）、极低频范围内的功率（VLF）、LF与HF之比（LF/HF）、标化的HF功率（HFnorm）、标化的LF功率（LFnorm）。对各组指标值及运动干预后增量进行比较分析。结果：（1）大量组运动干预后SDNN、RMSSD以及TP、HF显著高于运动干预前（P〈0.05）,LF/HF显著低于运动干预前（P〈0.05）;小量组运动干预前后各指标均无显著性变化。（2）大量组SDNN、RMSSD增量非常显著高于对照组（P〈0.01）、显著高于小量组（P〈0.05）,TP增量显著高于对照组和小量组（P〈0.05）,HF增量非常显著高于对照组（P〈0.01）、显著高于小量组（P〈0.05）,LF/HF增量显著低于对照组及小量组（P〈0.05）。结论：（1）12周强度为65%~80%VO2max、运动耗能量为1200kcal/wk的运动干预对40~49岁男性的HRV无显著影响。（2）12周强度为65%~80%VO2max、运动耗能量为2000kcal/wk的运动干预可以有效改善40-49岁男性的HRV。

Objective To explore the optimal exercise intervention for improving resting HRV of Chinese men. Methods Twenty four men,aged 24 to 49 years,were randomly divided into control group（C,n=9）,low exercise volume group（LV,n=7）,and high exercise volume group（HV,n=8）. The subjects in groups LV and HV ran respectively at the energy expenditure levels of 1200 kcal/wk（or 14 kcal/kg·wk）,and 2000 kcal/wk（or 23 kcal/kg·wk）for 12 weeks. Their heart rate variability（HRV）was tested before and after the exercise intervention. Results（1）The DNN,RMSSD,TP,and HF were significantly higher and LF/HF significantly lower after the intervention than that before the intervention in group HV（P 0.05）,while they remained unchanged in group LV after the intervention.（2）The increases in SDNN,RMSSD,TP,HF were significantly greater,and LF/HF was significantly lower in group HV after the intervention than in group LV and group C（P 0.05 and P 0.01）. Conclusion The resting HRV of Chinese men aged 24 to 49 improves significantly through 12-week exercise at the energy expenditure level of 2000 kcal/w,while remains unchanged at the level of 1200 kcal/wk.