他们首先梳理了相关研究的研究数据库,整理了自1980年以来发表的23篇文章。其中大多是观察性的,即科学家们只是对一群人进行了观察,询问他们的锻炼量,以及他们有多快乐。研究中也有一些是实验性的——人们开始锻炼后,研究人员会测量他们锻炼前后的快乐程度。
The number of participants in any one study was often small, but together, they represented more than 500,000 people ranging in age from adolescents to the very old and covering a broad range of ethnic and socioeconomic groups.
任何一项研究的参与人数通常都很少,但加起来占了50多万人,年龄分布从青少年到老年都有,覆盖了广泛的种族范围和社会经济群体范围。
And for most of them, the Michigan researchers found, exercise was strongly linked to happiness.
密歇根大学的研究人员发现,对其中大多数人来说,锻炼与幸福感之间都有着紧密联系。
“Every one of the observational studies showed a beneficial relationship between being physically active and being happy,” says Weiyun Chen, an associate professor of kinesiology at the University of Michigan, who, with her graduate student Zhanjia Zhang, wrote the review.
“每一个观察性研究都表现了身体活跃和快乐之间的正向联系,”密歇根大学(University of Michigan)人体运动学副教授陈蔚云说,她和她的研究生张展嘉一起撰写了这篇综述。
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