医生和研究人员长期以来都明白运动对健康有益。过去,联邦健康机构和医学协会建议美国人每周进行至少150分钟中等强度或75分钟高强度运动,并且每次持续10分钟的体育活动都可以计入总时长。然而,近期有研究开始关注更短时间的运动,这些运动常被称为“运动零食”,可能只有几分钟甚至更短——例如快速做几个开合跳、靠墙静蹲,或者在上班途中跑几趟楼梯。尽管尚不清楚是谁最先提出“运动零食”这个词,但根据研究人员的说法,这种“小剂量的运动也计入每周总时长”的概念在大约十年前开始在医学研究中获得更多关注。斯坦福预防研究中心医学讲师、研究运动零食的Marily Oppezzo表示:“我们过去认为,运动至少需要持续10分钟才有效果。”

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