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天寒地冻更要运动 不要老“窝”在家
发布时间:2011-01-12      来源:
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    三九四九,冻死猪狗。今年的1月9日进入三九,全年最冷的时候到来了。因为天气寒冷,许多人不愿意参加体育活动,“冬天动一动,少闹一场病,冬天懒一懒,多喝药一碗”,这些俗语说明冬季坚持体育锻炼非常有益于身体健康。

    越冻越要动

    郑州市第三人民医院神经内科专家夏昱说,体育运动是对抗寒冷的最好方式。事实证明,冬季到户外参加体育活动,身体受到寒冷的刺激,肌肉、血管不停地收缩,能够使心脏跳动加快,呼吸加深,体内新陈代谢加强,身体产生的热量增加。同时,由于大脑皮质兴奋性增强,有利于灵敏、准确地调节体温。这样,人的抗寒能力就可明显增强。

    大动前小动

    人在冬季从室内到室外,温度骤然降低,会使皮肤和肌肉立即收缩,关节和韧带僵硬,体内的代谢放缓。在这种情况下,若立即开始锻炼,有可能造成肌肉拉伤或关节损伤,而且由于心跳加快,还可能引起恶心、呕吐等不适应症状。因此,应做好准备活动,使浑身的肌肉、关节活动开,体内器官尤其是心脏进入适应运动的状态,提高神经中枢的兴奋性,血液循环和物质代谢得到改善。准备活动要做到浑身发热,这样开始活动,便会觉得四肢有力,精神饱满,寒冷也不足惧了。

    见“阳”再动

    老年人锻炼要选择在无风、有太阳的日子外出,要避免在大风、大寒、大雪、雾露中锻炼,大雾天空气浑浊,且能见度低,存在多种隐患。

    冬季老年人锻炼不可“闻鸡起舞”,最好在上午10点以后开始锻炼。因为冬天起床后,老年人虽然从表面看已处于清醒状态,而事实上一些器官还处在沉睡状态。在清晨气温较低的情况下,即使没有明显的心血管疾病,依然会由于寒冷影响神经活动的协调,造成血压升高,诱发心脑血管疾病。

    宜全身动

    天气不好的时候,选择在室内锻炼。锻炼时宜选择全身活动,因为局部活动反而对心脏有害。临床发现,心脏病人在室内做腿部蹲起或手部锻炼等局部活动时,尽管运动量比全身活动小,反而容易诱发心脏病。而跳交谊舞、做广播操、打太极拳等全身性肌肉活动时,全身肌肉血管舒张良好,既没有加重心脏负担,又达到了锻炼的目的。

    量力而动

    犯有低血糖、心律不齐及其他循环障碍的老人,其血液浓度比较高,尤其是在冬季的早上,这类老人要避免不吃早点就去跑步,否则会增加心脏和肝脏负担,因此最好在运动前适量进食进水;在运动后不能立刻进食,一定要待身体恢复平静后再进食。同时在运动时一定不能憋气。

    对于患有支气管炎等呼吸性疾病的老人,不要猛然进入冷空气中进行锻炼,要先在室外慢慢走一走,再开始进入专门运动状态。同时尽量不要迎风呼吸,最好采取背风运动,防止因为寒冷空气的骤然吸入对呼吸和消化系统的刺激,加重这方面的疾病。

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