首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Many of us sit in front of a computer for eight hours a day, and then go home and head for the couch to surf the Web or watch te
Many of us sit in front of a computer for eight hours a day, and then go home and head for the couch to surf the Web or watch te
admin
2012-02-29
49
问题
Many of us sit in front of a computer for eight hours a day, and then go home and head for the couch to surf the Web or watch television, exchanging one seat and screen for another. Even if we try to squeeze in an hour at the gym, is it enough to counteract (抵消) all that motionless sitting?
A mounting body of evidence suggests not.
Increasingly, research is focusing not on how much exercise people get, but how much of their time is spent in sedentary (久坐的) activity, and the harm that does.
The latest findings, published this week in The Journal of the American College of Cardiology, indicate that the amount of leisure time spent sitting in front of a screen can have such an overwhelming, seemingly irreparable (无法弥补的) impact on one’s health that physical activity doesn’t produce much benefit.
The study followed 4,512 middle-aged Scottish men for a little more than four years on average. It found that those who said they spent two or more leisure hours a day sitting in front of a screen were at double the risk of a heart attack or other heart events compared with those who watched less. Those who spent four or more hours of recreational time in front of a screen were 50 percent more likely to die of any cause. It didn’t matter whether the men were physically active for several hours a week — exercise didn’t reduce the risk associated with the high amount of sedentary screen time.
The study is not the first to suggest that sedentary activities like television viewing may be harmful. A 2009 study reported that young children who watch one and a half to five and a half hours of TV a day have higher blood pressure readings than those who watch less than half an hour, even if they are thin and physically active.
Recreational screen time has an "independent, injurious relationship" with heart and the blood vessels events and death of all causes, the paper concluded, possibly because it induces metabolic (新陈代谢) changes.
The study focused on recreational screen time because it’s the easiest to reduce, Dr. Stamatakis said. But he encouraged employees who work at computers all day to get up and take breaks and short walks periodically.
Why leisure time spent in front of the screen is related to heart diseases?
选项
A、Some content of the TV programs makes the heart beat faster.
B、It causes chemical processes in people’s body to change.
C、Extended sitting slows circulating blood to the heart.
D、Radiation from the screen causes physical harm to the heart.
答案
B
解析
根据题干中的related和heart diseases将本题出处定位到第七段。该段提到,该研究报告得出结论,坐在屏幕前的娱乐时间与心血管事件及各种原因所导致的死亡之间具有“独立而有害的关系”,这很可能是因为它会引起新陈代谢变化,[B]正是对原因的同义转述,故答案为[B]。其余三个选项在文中均未提及。
转载请注明原文地址:https://kaotiyun.com/show/6zf7777K
0
大学英语四级
相关试题推荐
Abooklikethisisnevertheworkofasingleauthororevenasmallgroupofauthors;rathertherearemanypeopleandinstitu
MoreandmoreAmericansarereadingtheirowncreditreport.Creditreportsare【B1】______bylenderstodecidehowrriskyitwoul
Departmentstoresarelargeretailstoressellingmanydifferentkindsofmerchandisearrangedin【B1】______departments.Suchsto
Departmentstoresarelargeretailstoressellingmanydifferentkindsofmerchandisearrangedin【B1】______departments.Suchsto
A、Cherrypie.B、Chocolatecake.C、Beefpudding.D、Toastedbread.A该题是对“野餐甜点”这一内容的考查。要做好该题,把握好maybewecouldaskKathytomakea
A、OnThursday.B、OnFriday.C、OnSaturday.D、OnSunday.C该对话围绕“野餐准备工作”展开。该题是对“野餐时间”这一细节内容的考查,该题答案出现在对话的首句I’mgoingtothesuper
A、Hersisterisafashionablewoman.B、Hersisterisdesigningadress.C、HersisterisstudyingSpanish.D、Hersisterisinthe
The【B1】______profession,or"showbusiness",attractsmanyyoungpeople.【B2】______,onlyveryfewcanhopetobecomefamousand【
Thereisanewtypeofsmalladvertisementbecomingincreasinglycommoninnewspaperclassifiedcolumns.Itissometimesplaced
Duringthe1980s,unemployment(失业人数)andunderemployment(不充分就业)insomecountrieswassohighas90percent.Somecountriesdidn
随机试题
(非英语类学生必做)Aschoolboy’slifeisinpreparationfortherealbattleoflife.Itisalso【61】ofdifferencesandinterests.O
《中华人民共和国固体废物污染环境防治法》规定:禁止擅自关闭、闲置或者拆除工业固体废物污染环境防治设施、场所;确有必要关闭、闲置或者拆除的,必须经所在地县级以上地方人民政府环境保护行政主管部门( ),并采取措施,防止污染环境。
下列流水参数中,不属于空间参数的是()。
钢筋代换时,必须征得()单位的批准。
证券监督管理机构应当自受理基金管理公司募集申请之日起()做出批准或者不予批准的决定。
随着通讯技术的进步,政府执政的舆论环境已发生了明显的变化,各种舆论可以借助网络、短信等方式跨越时空迅速传递,使意见空间加大、力度增强,而决策透明度的增加和公民民主参与意识的增强,又加大了政府的舆论压力。因此政府对“舆情危机”的处理,需要改变以往的被动方式,
InasurveyconductedbyresearchfirmHarrisInteractive,71%ofAmericanssaidthatspendingextramoneyontravelduringthe
下列选项中,不是Access数据库对象的是()。
(字处理题)在某学校任教的林涵需要对一篇Word格式的科普文章进行排版,按照如下要求,帮助她完成相关工作。修改文档的纸张大小为“B5”,纸张方向为横向,上、下页边距为2.5厘米,左、右页边距为2.3厘米,页眉和页脚距离边界皆为1.6厘米。
ManhasbecomemasteroftheEarth’ssurface.Heisconstantlyprobingintotheearth’sdepthsandintoatmosphere’supperreach
最新回复
(
0
)