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Every hour spent watching TV, DVDs and videos as an adult reduces life expectancy by almost 22 minutes, a study suggests。 It means that viewing TV for an average of six hours a day can cut short your life by five years。 The research claims that a sedentary lifestyle is as bad for health as smoking and obesity。 The academics from Queensland University conducted the study and set out to calculate the overall risk to life expectancy from watching television. Their research involved more than 11,000 people over the age of 25. Writing in the British Journal of Sports Medicine, they concluded: “TV viewing time may be associated with a loss of life that is comparable to other major chronic disease risk factors such as physical inactivity and obesity。” This finding is also comparable to risk factors such as smoking, with other research showing that one cigarette cuts 11 minutes off a lifespan – equivalent to half an hour of watching TV。 Other research suggests that sedentary behavior is linked to obesity, high levels of bad blood fats and other heart disease risk factors, and more opportunities for grazing on junk foods。 据英国《每日邮报》16日报道，研究表明，成人每多看一小时电视、光碟或视频就会使其寿命缩短将近22分钟。 这意味着，一个人平均每天看6小时电视，他的寿命就会缩短5年。 研究称，久坐不动的生活方式与吸烟和肥胖一样都对人体有害。 | 
