雅思阅读素材：久坐会致命.doc

雅思阅读素材：久坐会致命 雅思阅读素材：久坐会致命。下面为大家介绍了雅思阅读考试素材，关于久坐会致命的相关内容，供同学们进行下载参考。 雅思阅读材料之久坐会致命 Heres a new warning from health experts: Sitting is deadly. Scientists are increasingly warning that sitting for prolonged periods — even if you also exercise regularly — could be bad for your health. And it doesnt matter where the sitting takes place — at the office, at school, in the car or before a computer or TV — just the overall number of hours it occurs. Research is preliminary, but several studies suggest people who spend most of their days sitting are more likely to be fat, have a heart attack or even die. In an editorial published this week in the British Journal of Sports Medicine, Elin Ekblom-Bak of the Swedish School of Sport and Health Sciences suggested that authorities rethink how they define physical activity to highlight the dangers of sitting. While health officials have issued guidelines recommending minimum amounts of physical activity, they havent suggested people try to limit how much time they spend in a seated position. After four hours of sitting, the body starts to send harmful signals, Ekblom-Bak said. She explained that genes regulating the amount of glucose and fat in the body start to shut down. Even for people who exercise, spending long stretches of time sitting at a desk is still harmful. Tim Armstrong, a physical activity expert at the World Health Organization, said people who exercise every day — but still spend a lot of time sitting — might get more benefit if that exercise were spread across the day, rather than in a single bout. That wasnt welcome news for Aytekin Can, 31, who works at a London financial company, and spends most of his days sitting in front of a computer. Several evenings a week, Can also teaches jiu jitsu, a Japanese martial art involving wrestling, and also does Thai boxing. Im sure there are some detrimental effects of staying still for too long, but I hope that being active when I can helps, he said. I wouldnt