People who regularly engage in light to moderate physical activity — like walking four hours a week or swimming two hours weekly — might have less severe strokes than individuals who aren’t as active, a Swedish study suggests.

　　瑞典的一项研究表明：经常进行轻微或者适度锻炼的人，例如：每周步行四小时或每周游泳两小时，可能比不经常运动的人患中风的几率要小。

　　Researchers examined data on 925 patients who were treated for strokes at Sahlgrenska University Hospital in Gothenburg, Sweden, between 2014 and 2016. Overall, four in five of these patients had mild strokes.

　　在2014年到2016年期间，研究人员调查了瑞典哥德堡的萨尔格伦斯卡大学医院中925名患有中风的病人的数据。这些病人中，五分之四的病人是轻度中风。

　　Slightly more than half of the patients were inactive before their strokes. Compared with this inactive group, people who got at least some exercise before their strokes were twice as likely to have mild strokes, researchers reported in Neurology.

　　研究人员在《神经病学》(Neurology)杂志上表示，有一半以上的病人在中风前是很少锻炼的，相比之下，在中风前至少做过一些锻炼的人患轻度中风的可能性是不锻炼的人的两倍。

　　We knew from earlier research that physical activity could reduce stroke incidence, lead study author Malin Reinholdsson of the University of Gothenburg said by email. "However, whether or not pre-stroke physical activity could also influence stroke severity was not clear."

　　哥特堡大学的带头学者在邮件中说道：“我们在早期的研究中得知，锻炼身体可以减小患上中风的概率，但是，在中风前才锻炼能否也减小中风的严重程度还不得而知。”

　　Patients in the study were 73 years old on average and most of them had what’s known as an ischemic stroke, the most common kind, which occurs when a clot blocks an artery carrying blood to the brain. About 6 percent of patients had hemorrhagic strokes, a less common type that is caused by a ruptured blood vessel in the brain.

　　被调查的病人的平均年龄为73岁，他们大多数人都患有流行的缺血性中风，这是中风中最常见的一种，当输送至大脑的血液在动脉发生结块阻塞时易患上此病。大约有6%的病人患有出血性中风，这是中风中较少见的一种类型，当脑血管破裂时易患上此病。