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
2010-06-18
16
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 the 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.
"Couch potatoes" probably means ______.
选项
A、people who suffer high mortality
B、people who take little exercise
C、people who walk 40 miles a week
D、people who have a lower rate of heart disease
答案
B
解析
转载请注明原文地址:https://kaotiyun.com/show/wWlO777K
0
专业英语八级
相关试题推荐
A、Thelifeandworkingonarealdesertisland.B、TheleadingroleofaHollywoodstar.C、Thefilm-makingofacommercial.D、The
LordPercyofNewcastle,Britain’sministerofeducationin1924-29,wasnofanofthefadforhappy-clappy"progressive"educat
Nowadayswiththedevelopmentofeconomy,existingcitiesaregrowingbiggerandnewcitiesareappearing.Whatdoyouthinkis
OnecharacteristicoftherichclassesofadecliningsocietyistheirtendencytoEtiquetteasanartofgraciouslivingisqu
Fromthefirstparagraph,wegettheimpressionthatGeorgeMarshAccordingtoDavidWedin,theextinctionofmanyspeciesare
Accordingtothedoctor,KapsakandEkaUdo’schildrenThebesttitleforthepassagewouldprobablybe
TessoftheDurbervilleswaswrittenby_____.
A、theDoharoundcan’tbefinishedby2006B、strongpoliticalwillisnecessaryC、nationscancontinuethenegotiationevenif
Besides"American"characteristics—individualism,self-reliance,informality,punctualityanddirectness,therearealsosome"
Besides"American"characteristics—individualism,self-reliance,informality,punctualityanddirectness,therearealsosome"
随机试题
一批零件中有10个合格品和2个废品,安装机器时,从这批零件中任取一个,如果每次取出废品后不再放回,用X表示在取得合格品以前已取出的废品数,求:(1)随机变量X的分布列;(2)随机变量X的分布函数.
第一次提出毛泽东思想这一概念的是()
护士对患者进行评估时,不属于资料来源的是
应在账户借方核算的是()。
某企业鉴于市场竞标的需要拟申请质量管理体系认证,以增强参与市场竞争的能力,为此组织相关人员对有关标准进行了研究,以加深对标准的理解。下列关于质量计划的理解,正确的是()。
2021年6月,国务院新闻办公室发表的《中国共产党尊重和保障人权的伟大实践》白皮书指出,中国共产党丰富发展了人权文明多样性。这种多样性体现在哪些方面?()
太阳照射大地,一片光明,相对地,月光就显得柔和、暗淡,月光之所以没有太阳光线强,主要是因为()。
在项目可行性研究内容中,_____________包括制定合理的项目实施进度计划、设计合理的组织结构、选择经验丰富的管理人员、建立良好的协作关系、制订合适的培训计划等内容。
AIDSthreatensnotonlylivesbutalso-inpoorcountries-economicdevelopment.By【C1】______mainlyatadults20to49yearsold
Ifyouintendtomeltthesnowfordrinkingwater,youcan________extrapuritybyrunningitthroughacoffeefilter.
最新回复
(
0
)