运动干预对40～49岁男性运动中心电风险指标的影响  

Effects of Exercise Intervention on Risk Indicators of ECG during Exercise in Males in Their Forties

作　　者：黄剑雅 曹建民[2] 苏浩[2] 林家仕[3] 谢敏豪[4] 

机构地区：[1]江苏省体育科学研究所,南京210033 [2]北京体育大学运动人体科学学院 [3]集美大学体育学院 [4]国家体育总局运动医学研究所

出　　处：《中国运动医学杂志》2017年第8期687-692,共6页Chinese Journal of Sports Medicine

基　　金：国家科技支撑计划资助项目(2006BAK33B02)

摘　　要：目的:通过对40~49岁男性进行为期12周不同运动量的运动干预,探寻改善运动中心电风险指标的最佳运动干预方式。方法:24名40~49岁的城市健康男性,随机分为3组:对照组(n=9);小运动量组(n=7),运动量为1200 kcal/wk;大运动量组(n=8),运动量为2000 kcal/wk。运动组的运动强度均为65%~80%VO2max,在标准的400米跑道上进行持续12周的运动干预。运动过程中佩戴加速度计和心率表进行监控,运动量通过运动距离和时间控制,强度通过靶心率控制。干预前后对受试者进行递增负荷实验,实验中同时采用12导联心电测试仪记录受试者运动时心电图的ST段下压幅度、校正后的QT间期离散度(QTcd)指标。结果:(1)比较干预前后运动测试完成时心电图指标发现,干预前后各组ST段下压幅度没有产生显著变化,而小运动量组和大运动量组心电图指标QTcd干预后均显著低于干预前(P<0.05)。(2)通过对运动中心电图指标差值分析比较发现,小运动量组QTcd下降幅度显著高于对照组(P<0.05),而大运动量组QTcd下降幅度非常显著高于对照组(P<0.01),各组ST段下压幅度差值之间没有显著性差异。结论:12周强度为65%~80%VO2max、运动量为1200 kcal/wk和2000 kcal/wk的运动干预对运动中心电ST段下压幅度没有显著影响,两种运动量均可以使运动中心电图QTcd显著降低,进而降低运动诱导产生的心肌缺血的风险。Objective To explore the optimal exercise way of improving the risk indicators of electro- cardiogram （ECG） during exercise. Methods Twenty-four healthy male subjects aged between 40 and 49 years old were divided randomly into a control group （n=9）,a low amount exercise group of 1200 kcal/wk （n=7） and a high amount exercise group of 2000 kcal/wk （n=8）. The intensity of the exer- cise groups was 65% ~ 80%VO2max training in the standard 400 m track for 12 weeks. The accelerome- ter and polar watch were worn to monitor the exercise process. During the exercise, the exercise amount was controlled using the distance and duration while the intensity was controlled using target heart rate. The subjects took part in the graded exercise test before and after the exercise intervention. Twelve lead electrocardiograms were used to measure the indicators of ST segment depression and corrected QT interval dispersion （QTcd） during the exercise. Results The exercise intervention did not re- sult in significant change in ST segment depression, while the QTcd indicator in both the exercise groups decreased significantly after the intervention （P〈0.05）. Moreover,the decrease of QTcd indicator in the low amount exercise group was significantly higher than that of the control group （P〈0.05）, while the decrease of QTcd indicator in high volume group was higher than that of the control group （P〈0.01）. No significant differences were found in the ST segment depression among the 3 different groups. Conclusion The Twelve-weeks exercise interventions with intensity of 65% - 80% VO2max and exercise amount of 1200 kcal/wk and 2000 kcal/wk have no effect on the ST segment depression during the exercise. However, they can result in significant decrease in the QTcd of ECG during exercise, reducing the risk of exercise-induced myocardial ischemia.

关 键 词：运动干预 心电图 运动风险 

分 类 号：R87[医药卫生—运动医学]