运动干预对40～49岁男性运动中心电风险指标的影响

发布时间：2018-04-09 23:08

本文选题：运动干预　切入点：心电图　出处：《中国运动医学杂志》2017年08期

【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(P0.05)。(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(P0.05),而大运动量组QTcd下降幅度非常显著高于对照组(P0.01),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。
[Abstract]:Objective: to explore the best exercise intervention method to improve the electrical risk index of motor center by 12 weeks exercise intervention in men aged 40 to 49 years old.Methods Twenty four healthy urban men aged 40 to 49 were randomly divided into three groups: control group (n = 9), small exercise group (n = 7) with 1200 kcal / wk exercise, and large exercise group (n = 8) with 2000 kcal / wk exercise.The exercise intensity of the exercise group was 65% and 80% VO2 max.The exercise intervention lasted 12 weeks on the standard 400 meter track.During exercise, the accelerometer and heart rate meter are used to monitor the exercise, the exercise amount is controlled by distance and time, and the intensity is controlled by the target heart rate.At the same time, 12-lead ECG tester was used to record the amplitude of St segment pressure and the corrected QT interval dispersion (QTcd) of ECG before and after intervention.Results (1) comparing the electrocardiogram indexes of exercise test before and after intervention, we found that there was no significant change in the amplitude of St segment pressure before and after intervention.The electrocardiogram index (QTcd) in the small exercise group and the large exercise group was significantly lower than that in the pre-intervention group (P0.05. 2).The decrease of QTcd in the small exercise group was significantly higher than that in the control group (P 0.05), while that in the large exercise group was significantly higher than that in the control group (P 0.01).Conclusion the exercise intervention of 1200 kcal/wk and 2000 kcal/wk had no significant effect on the amplitude of depression of St segment in exercise center. Both kinds of exercise could significantly decrease the QTcd of electrocardiogram during exercise, and the volume of exercise was 65% and 80%, and the volume of exercise was 1200 kcal/wk and 2000 kcal/wk respectively, and there was no significant effect on the amplitude of hypobaric pressure of St segment in exercise center.This in turn reduces the risk of exercise-induced myocardial ischemia.
【作者单位】：江苏省体育科学研究所;北京体育大学运动人体科学学院;集美大学体育学院;国家体育总局运动医学研究所;
【基金】：国家科技支撑计划资助项目(2006BAK33B02)
【分类号】：R87

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