温和运动保障你的健康

　　反之，激烈的、过度的运动却使儿茶酚胺和促肾上腺皮质激素分泌增多，从而使T细胞受体因“饱和”而功能 锐减，同时还可反馈性地使血液中的T淋巴细胞减少，并抑制B淋巴细胞的生物活性，降低免疫功能。因此，超负 荷运动后人体极易疲劳，甚至加重已患疾病的病情。过度运动显然对身体不利。也有很多人只在有时间或有心情时 才偶尔做运动。这种偶尔为之的“运动”，对健康更是无益，它很容易破坏人体正常的新陈代谢过程，甚至还会加 重器官的磨损，导致寿命缩短。
因此有专家建议，宜将“生命在于运动”倡导语改为“生命在于适度运动”。美国运动生理学家莫尔豪斯认为，“ 运动应当在顺乎自然和圆形平面（指一种平缓的而非陡然的过程）的方式下进行。”运动量由小到大，动作由简单 到复杂，讲究舒适自然，循序渐进。比如跑步，刚开始练跑时要跑得慢些、距离短些，经过一段时间锻炼，再逐渐 增加跑步的速度和距离。美国有关专家提出了温和运动健身的新观点,煮蛋器。温和运动就是一种低强度、低能量消耗的运动模式，也称“适度锻炼”，即每周消耗2000千卡热量的体能， 相当于打2—3小时的乒乓球。
　　那么，怎样才能掌握一个合适运动量，进行“温和运动”呢？目前比较公认且简便易行的评判标准是：以每次 锻炼之后，感觉不到过度疲劳为适宜。也可以用脉搏及心跳频率作为运动量的指标，若运动量大，心率及脉率就快 。对于正常成年人的运动量，以每分钟心率增加至140次为宜；老年人的运动量，以每分钟增加至120次为宜 。每个人每天都能累积相当于半小时的“温和运动”，比如骑自行车上下班，乘公交车提前一站下车步行，在机关 办公时不乘电梯而爬楼梯以及早晚散步等等，其活动量就基本够了。选择了适度的“温和运动”方法，就要持之以 恒养成习惯，“温和运动”是持续的锻炼，它对人的意志和毅力是一个严峻的考验，只有锲而不舍的人，才能享受 到它带给你的健康快乐。

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