现今青少年沦为"久坐族"

The study, published in The Journal of Pediatrics, looking at 72,845 schoolchildren aged 13 to 15 from North and South America, Asia, Europe, and the Middle East. The children were surveyed between 2003 and 2007.

　　该研究在《儿科学期刊》上发表。研究人员于2003年至2007年间对南北美洲、亚洲、欧洲和中东地区年龄在13岁到15岁之间的72845名学生进行了调查。

　　The researchers defined adequate physical activity as at least an hour of exercise outside of gym class at least five days a week.

　　研究人员将“充足的身体锻炼”定义为每周至少锻炼五天，每天至少进行一小时的户外锻炼。

　　Children who spent three or more hours a day watching TV, playing computer games, or chatting with friends -- aside from time in school or time spent doing homework -- were classified as sedentary.

　　除了在学校或做作业的时间外，每天看电视、玩电脑游戏或和上网聊天的时间超过三小时的孩子被定义为”惯于久坐”。