用户名: 密码: 验证码:    注册 | 忘记密码?
首页|听力资源|每日听力|网络电台|在线词典|听力论坛|下载频道|部落家园|在线背单词|双语阅读|在线听写|普特网校

新视野大学英语 读写教程第三册 unit2-c

2011-07-29    来源:网络    【重庆时时彩五星定胆      普特网校:美国外教1对1

本文地址:http://www.yeidj.com.cn/html/course/classicNewHorizons3/20110729/35219.html
文章摘要:新视野大学英语 读写教程第三册 unit2,线段鳌鸣鳖应扩频,关键性三月风一见钟情。

新概念| 重新定义经典英语教材

Exercise for the Old

As a scientist, one of Steven Wolf's favorite questions to ask people at the end of a study is: "Whatcan you do now that you couldn't do before?"One of the best answers he's ever received came from an 86-year-old man who learned the ancientChinese exercise form of tai chi as part of Wolf's study of how exercise can help seniors prevent falls.

"The man smiled at me, then lifted up one foot, bent over, and took off his shoe while balancing on hisother leg," recalls Wolf, a professor and researcher. "Then, still balancing on one leg, the 86-year-oldgentleman stood back up, bent over again, and put his loafer back on. What impressed me the most wasthat he couldn't do this before studying tai chi."Although many people assume that balance and movement problems are inevitable with age, anincreasing body of evidence demonstrates that exercise can help improve balance and strength inelderly individuals and reduce their chance of falling. In Wolf's study, published in May 1996, 215seniors aged 70 to 96 were divided into three groups. One group performed balance exercises on acomputer-controlled platform once a week, one group took a weekly tai chi class, and a control groupmet for a weekly discussion. After 15 weeks, "the tai chi group did the best, and reduced the chance ofhaving a fall by 47 percent," Wolf said.

In addition, the tai chi group also showed significant improvement in the condition of their hearts andquality-of-life measurements, such as a reduced fear of falling and an increased sense of control overtheir lives. "Tai chi has been used in China as an exercise for older individuals for three centuries and asa military art for 2,000 years," Wolf says. "The movements are very slow and careful and involve agreat deal of body movement and standing on a single limb. Practicing these movements is like learningstrategies you can use to avoid falling down."Tai chi is just one form of exercise studied for its fall-preventing benefits as part of a recentlycompleted six-year project by the National Institute on Aging and the National Institute of NursingResearch. More than 1,500 seniors at seven sites around the country participated in the trials. "Thestudies showed that even a low level of exercise can reduce the risk of falls," notes WashingtonUniversity scientist Michael Province, whose analysis of the data on exercise and fall preventionappeared last year in The Journal of the American Medical Association. "Exercise can help older adultsimprove strength, balance, the ability to bend, and prevents them from tiring as easily. Improvementsin one area often carry over into another."In general, "the evidence is increasing that the more older people can do in terms of exercise, thebetter off they are — with two pieces of advice," says Province. First, older exercisers should be sure tocheck with a doctor to make sure any new exercise program is safe and appropriate. Second, seniorsshould start under the guidance of a qualified teacher to make sure they're doing exercises properlyand not doing too much, too soon — especially if they've been inactive.

"The problem is that to improve balance, you've got to challenge balance, which is always risky," saysMary E. Tinetti of the Yale University School of Medicine, who studied 301 men and women aged 70and older with at least one risk factor for falling, such as muscle weakness or use of certain medicines.

To reduce these seniors' risk of falling, Tinetti used multiple methods, including having an exerciseteacher go to a person's home and teach balance exercises. "The teacher wasn't necessarily there withthem every time they did the exercise," Tinetti notes.

顶一下
(2)
100%
踩一下
(0)
0%
手机上普特 m.putclub.com 手机上普特
[责任编辑:SwearSo]
------分隔线----------------------------
发表评论 查看所有评论
请自觉遵守互联网政策法规,严禁发布色情、暴力、反动的言论。
评价:
表情:
用户名: 密码: 验证码:
  • 推荐文章
  • 资料下载
  • 讲座录音
普特英语手机网站
用手机浏览器输入m.putclub.com进入普特手机网站学习
查看更多手机学习APP>>
 
幸运飞艇直播开奖网站 pk10关于5码的一些技巧 幸运飞艇投注 幸运飞艇彩票 幸运飞艇大运
幸运飞艇冠亚包赢钱 北京pk10技巧 重庆幸运农场开奖走势 幸运飞艇平台 幸运农场中奖助手
重庆幸运农场手机软件 幸运农场平台出租 幸运飞艇的记录走势图 幸运飞艇开奖直播官网 幸运飞艇软件
pk10凤凰娱乐 pk10官网 幸运飞艇开奖直播网址 幸运飞艇必赢计划软件 北京赛车冠军规律破解