请阅读短文,完成此题。Here"s a warning from health experts: Sitting is deadly. Scientists are increasingly warningthat sitting for prolonged periods--even if you also exercise regularly--could be bad for yourhealth. And it doesn"t matter where the sitting takes place at the office, at school, in the car orbefore 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 dayssitting 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-Bakof the Swedish School of Sport and Health Sciences suggested that authorities rethink how theydefine physical activity to highlight the dangers of sitting.While health officials have issued guidelines recommending ~nini~num amounts of physicalactivity, they haven"t 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. Sheexplained 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 whoexercise every day--but still spend a lot of time sitting--might get more benefit if that exercisewere spread across the day, rather than in a single bout.That wasn"t 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 alsoteaches jiujitsu, a Japanese martial art involving wrestling, and also does Thai boxing."I"m sure there are some detrimental effects of staying still for too long, but I hope that beingactive when I can helps," he said. "I wouldn"t want to think the sitting could be that dangerou
A.Exercising more can reduce the harm brought by sitting B.Sitting for a long time is harmful for people"s health C.Exercising regularly is also bad for people"s health D.Where you sit will not affect your health