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首页 » Circulation:久坐看电视会增加罹患心血管疾病风险

Circulation:久坐看电视会增加罹患心血管疾病风险

来源:新华网 2010-01-13 11:50

澳大利亚最新一项研究成果表明,长期久坐不动会增加罹患心血管疾病的危险,使死亡率升高。这一研究报告11日刊载于美国心脏病协会期刊《循环》网络版。

为研究国内糖尿病、心脑血管疾病和肾病的发病情况,澳大利亚研究人员对全国8800名25岁以上的居民进行调查,其中包括3846名男性和4954名女性,这些人均没有心脑血管疾病病史。调查主要针对研究对象的生活习惯,如在过去一周里看电视的时间等。研究人员同时也采集了这些人的血样,以获得相应的胆固醇和血糖数据。

研究结果显示,人们每看一小时电视,因心脑血管疾病死亡的危险性就会增加18%,因其他原因死亡的危险性也会增加11%。即使把年龄、性别、腰围、运动习惯等因素都考虑在内,结果仍然相同。报告还说,排除吸烟、高胆固醇、高血压、不良饮食等因素,每天看电视超过4小时的人与少于2小时的人相比,因心脑血管疾病死亡的危险性增加80%,因其他原因死亡的危险性增加46%。

看电视在不少国家成为人们消磨闲暇时间的最主要方式。澳大利亚和英国人平均均每天看3小时电视,美国人则看约5小时。研究人员说,看电视“剥夺”了人们的活动时间,而适量活动有益心血管健康。之前也有研究表明,喜欢长时间看电视的人消耗的卡路里数量更少。

研究报告作者之一、澳大利亚Baker IDI心脏与糖尿病研究所研究员戴维·邓斯坦的话报道:“随着社会、经济、科技的发展,需要人们用体力去做的事越来越少。对不少人来说,他们的日常生活已经简化到从一把椅子挪到另一把椅子上——人们在车座、办公椅和电视机前的沙发之间来回转换。结果是,人们的能量消耗减少的同时,寿命也在缩短。”

这份报告还指出,体重过轻的人和标准体重的人也不要过于乐观,长期久坐同样会对他们的血糖和血脂造成不良影响。研究人员说,如果人们能少看电视,多活动身体,哪怕是做些比较缓和的运动,都能有效降低罹患心脑血管疾病的潜在危险。他们建议,为了身体健康,除进行有规律的体育运动外,每坐一段时间还要站起来走动,活动身体,要时刻提醒自己“多运动,常运动”。(生物谷Bioon.com)

生物谷推荐原始出处:

Circulation. 2010 January 11, 2010, doi: 10.1161/CIRCULATIONAHA.109.894824

Television Viewing Time and Mortality. The Australian Diabetes, Obesity and Lifestyle Study (AusDiab)

D. W. Dunstan PhD*, E. L.M. Barr PhD, G. N. Healy PhD, J. Salmon PhD, J. E. Shaw MD, B. Balkau PhD, D. J. Magliano PhD, A. J. Cameron PhD, P. Z. Zimmet PhD, and N. Owen PhD

From the Baker IDI Heart and Diabetes Institute, Melbourne, Australia (D.W.D., E.L.M.B., G.N.H., J.S., J.E.S., B.B., D.J.M., P.Z.Z., N.O.); Department of Epidemiology and Preventive Medicine, Monash University, Melbourne, Australia (D.W.D., E.L.M.B., J.E.S., D.J.M., P.Z.Z.); Cancer Prevention Research Centre, School of Population Health, University of Queensland, Brisbane, Australia (D.W.D., G.N.H., N.O.); School of Exercise and Nutrition Sciences, Deakin University, Melbourne, Australia (D.W.D., J.S., A.J.C.); Vario Health Institute, Edith Cowan University, Perth, Australia (D.W.D.); and INSERM U780, Villejuif, University Paris-Sud, Orsay, France (B.B.).

Background—Television viewing time, the predominant leisure-time sedentary behavior, is associated with biomarkers of cardiometabolic risk, but its relationship with mortality has not been studied. We examined the associations of prolonged television viewing time with all-cause, cardiovascular disease (CVD), cancer, and non-CVD/noncancer mortality in Australian adults.

Methods and Results—Television viewing time in relation to subsequent all-cause, CVD, and cancer mortality (median follow-up, 6.6 years) was examined among 8800 adults 25 years of age in the Australian Diabetes, Obesity and Lifestyle Study (AusDiab). During 58 087 person-years of follow-up, there were 284 deaths (87 CVD deaths, 125 cancer deaths). After adjustment for age, sex, waist circumference, and exercise, the hazard ratios for each 1-hour increment in television viewing time per day were 1.11 (95% confidence interval [CI], 1.03 to 1.20) for all-cause mortality, 1.18 (95% CI, 1.03 to 1.35) for CVD mortality, and 1.09 (95% CI, 0.96 to 1.23) for cancer mortality. Compared with a television viewing time of <2 h/d, the fully adjusted hazard ratios for all-cause mortality were 1.13 (95% CI, 0.87 to 1.36) for 2 to <4 h/d and 1.46 (95% CI, 1.04 to 2.05) for 4 h/d. For CVD mortality, corresponding hazard ratios were 1.19 (95% CI, 0.72 to 1.99) and 1.80 (95% CI, 1.00 to 3.25). The associations with both cancer mortality and non-CVD/noncancer mortality were not significant.

Conclusions—Television viewing time was associated with increased risk of all-cause and CVD mortality. In addition to the promotion of exercise, chronic disease prevention strategies could focus on reducing sitting time, particularly prolonged television viewing.

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