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
THE MAGIC OF EXERCISE Suppose there was a potion that could keep you strong and trim as you aged, while protecting your heart
THE MAGIC OF EXERCISE Suppose there was a potion that could keep you strong and trim as you aged, while protecting your heart
admin
2011-01-02
77
问题
THE MAGIC OF EXERCISE
Suppose there was a potion that could keep you strong and trim as you aged, while protecting your heart and bones; improving your mood, sleep and memory; warding off breast and colon cancer, and reducing your overall risk of dying prematurely. Studies have shown that exercise can have all those benefits —even for people who take it up late in life. Kin Narita and Gin Kanie, Japanese twins who are national longevity icons, celebrated their 105th birthday last week by planting trees and playing golf for the first time. Kanie suggested that activity might be a key to their long lives. "At this age I walk for two hours each morning for exercise," she said.
When Dr. Ralph Paffenbarger started tracking the health of 19,000 Harvard and University of Pennsylvania alumni back in the early 1960s, many experts thought vigorous exercise was downright dangerous for people over 50. But the Stanford epidemiologist turned that wisdom on its head. In a landmark 1986 study, Paffenbarger showed that the participants’ death rates fell in direct proportion to the number of calories they burned each week. Those burning 2,000 a week (roughly the number it takes to walk 20 miles) suffered only half the annual mortality of the couch potatoes, thanks mainly to a lower rate of heart disease.
Subsequent studies have shown that different activities bring different rewards. Everyone now agrees that aerobic exercise preserves the heart, lungs and brain, and researchers at Tufts University have recently shown that weight lifting can do as much for the frail elderly as it does for high school jocks. When Dr. Maria Fiatarone got 10 chronically ill nursing-home residents to lift weights three times a week for two months, the participants’ average walking speed nearly tripled, and their balance improved by half.
EATING TO NOURISH LONG LIFE
We all know that living on fat, salt and empty calories can have a range of nasty consequences, from obesity and impotence to hypertension and heart disease. Yet there are other ways to eat, and people who adopt them stay younger longer. In controlled studies, San Francisco cardiologist Dean Ornish has shown that a diet based on low-fat, nutrient-rich foods not only prevents heart disease —the Western world’s leading cause of early death —but can help reverse it. And other studies suggest that dietary changes could virtually eliminate the high blood pressure that places 50 million older Americans at high risk of stroke, heart attack and kidney failure.
You wouldn’t know that from watching people age in the United States. Hypertension afflicts a third of all Americans in their 50s, half of those in their 60s and more than two thirds of those over 70. But preindustrial people don’t follow that pattern. Whether they happen to live in China or Africa, Alaska or the Amazon, people in primitive settings experience no change in blood pressure as they age, and tile reason is fairly simple: they don’t eat processed foods. Dr. Paul Whelton of Tulane University’s School of Public Health has spent the past decade tracking 15,000 indigenous Yi people in southwestern China. As long as they eat a traditional diet —rice, a little meat and a lot of fresh fruits and vegetables-these rural farmers Virtually never develop hypertension. But when they migrate to nearby towns, their blood pressure starts to rise with age.
What makes processed food so harmful? Salt is one key suspect. When you subsist mainly on fresh plant foods —as our ancestors did for roughly 7 million years —you get 10 times more potassium than sodium. That 10-to-one ratio is, by Eaton’s reasoning, the one our bodies are designed for. But salt is now showered on foods at every stage of processing and preparation, while potassium leaches out. As a result, most of us now consume more salt than potassium. "Modern humans are the only mammals that do that," says Eaton, "and we’re the only ones that develop hypertension."
A recent clinical study suggests that dietary changes can reduce blood pressure as markedly as drug treatment, and can produce results in as little as two months. In the study, researchers at several institutions place volunteers on one of three diets. Those on a low-fat menu that included 10 daily servings of fresh fruits and vegetables, plus two servings of calcium-rich dairy products, reduced their systolic and diastolic readings by 5.5 mm and 3.0 mm, respectively. And those suffering from hypertension get reductions of twice that magnitude.
According to Dr. Ralph Paffenbager’s study, ______.
选项
A、aerobic exercise help prevent lung diseases
B、vigorous exercise is dangerous for poeple over 50
C、weight lifting can do much good to the frail elderly
D、the more exercise one does, the less one is likely to die
答案
D
解析
转载请注明原文地址:https://kaotiyun.com/show/aEeO777K
0
专业英语八级
相关试题推荐
1 FortheGreeks,beautywasavirtue:akindofexcellence.Personsthenwereassumedtobewhatwenowhavetocall-lamely,e
Becausecollegesanduniversitiesperformsuchawidevarietyofroles,someeducatorscomplainthattheirinstitutionsareexpe
A、650millionB、750millionC、abillionD、10billionB
ProblemsoftheComputerAgeComputerplaysmoreandmoreimportantrolesinourdailylife.Isthereadarksidetothecomp
ThepoemAPsalmofLifewaswrittenby______.
A、escalatedintociviccampaignsnationwideB、calledforaboycottofJapanesegoodsC、postponedjointmilitaryexerciseswithT
Sciencehaslonghadanuneasyrelationshipwithotheraspectsofculture.ThinkofGallileo’s17thcenturytrialforhisrebell
中国共产党人究竟是什么样的人?他们同其他地方的共产党人或社会党人有哪些地方相同,哪些地方不同?这些战士战斗得那么长久,那么顽强,那么勇敢,而且就像蒋介石的部下私下承认的,整体上讲是那么无敌。他们到底是什么样的人?他们那样地战斗为什么?是什么支持着他
A、LegislationtoreducetheUSdebtiswaitingtobeapprovedbyCongress.B、TheUSisamongthe30countrieswithoutvotingpri
TheCommercialisationofScienceandTechnologyScienceandtechnologyandtheroleofcommercialisationinthatareaarever
随机试题
下肢牵引时抬高床尾的主要目的是
A.肩胛间区、胸骨旁、上腹部可闻及血管杂音B.大量蛋白尿C.尿中白细胞、脓细胞较多,且有尿频、尿急史D.满月脸,多毛E.发作时血压骤升伴剧烈头痛,心悸,不发作时血压可正常患者,男性.30岁。发作性血压增高,发作时血压达200/1
关于检查创伤时的注意事项中,哪项不正确
A.单侧喉返神经损伤B.双侧喉返神经损伤C.喉上神经内支损伤D.喉上神经外支损伤E.甲状旁腺损伤甲状腺大部切除术后出现手足抽搐的原因为
兽药经营企业应当注意收集兽药使用信息,不在发现内容应当及时向所在地兽医行政管理部门报告之列的是()。
在野外常见的边坡变形破坏类型中,边坡岩体主要在重力作用下向临空方向发生长期缓慢的塑性变形现象,称为()。
记账凭证核算形式是适用于一切企业的会计核算形式。()
公开发行证券的,主承销商应当在证券上市后20日内向中国证监会报备承销总结报告,总结说明发行期间的基本情况及新股上市后的表现,并提供下列文件:募集说明书单行本;承销协议及承销团协议;律师鉴证意见(限于首次公开发行);会计师事务所验资报告;中国证监会要求的其他
下列因素中,能够决定行业进入壁垒大小的因素包括()。
与淋巴瘤发病有关的病原体是
最新回复
(
0
)