官方APP下载:英语全能特训(微信小程序版,支持苹果手机、安卓手机)
创办于2003年
UNSV记不住?那就记中文谐音“忧安思危”吧!
  Slow and Steady Wins the Race!
UNSV英语学习频道 - Slow and steady wins the race!
公众微信服务号
英语全能特训(微信公众服务号)
UNSV英语学习频道淘宝网店
客服短信:18913948480
客服邮箱:web@unsv.com
初级VIP会员
全站英语学习资料下载。
¥98元/12个月

What Is Chronic Fatigue Syndrome?

阅读次数:


VIP会员专享下载:(非VIP会员无权下载!如果想下载,但还不是VIP会员,请点此订购
下载方式:使用鼠标右键(注意是鼠标右键!)点击下面的MP3音频/MP4视频链接,然后选择“另存为…”。
MP3节目录音 MP3节目录音 
文章原文
同步字幕

Chronic fatigue syndrome is one of the most troubling mysteries in modern medicine. Many years after first recognizing the disorder, researchers still do not know what causes it.

Now the United States' National Institutes of Health is using volunteers in a unique study. The goal is to learn more about the condition, which affects an estimated 2.5 million Americans.

Zach Ault's story

For years, Zach Ault, a father of three, enjoyed being physically active. He was even training for a half-marathon. He would go on long runs in hopes of competing in the race.

But in 2017, he took time off to recover from an infection. After recovering, he tried to continue his runs but could not complete them.

An invisible disease began causing Ault problems. He was not able to spend time with his children. He had to cut back his job. Even sleeping as much as 16 hours a day made no difference in his condition.

"His body had literally hijacked him and it wasn't going to allow him to push through," said Anne Ault, his wife.

After months of testing, doctors announced their diagnosis of Ault's condition.

Chronic fatigue is a difficult issue

Chronic fatigue syndrome makes an individual feel extremely tired. This fatigue lasts more than six months and becomes worse after any kind of physical exertion.

Patients may have difficulty standing upright. They also may have trouble thinking, often described as a "brain fog."

Many cases go undiagnosed or misdiagnosed. There are no approved treatments, or even tests to help with diagnosis. There is no way to predict who will recover and who will have a severe case that lasts for years.

Doctors at the National Institutes of Health are looking for more clues. They are interested in people who came down with the disorder after an infection, of any kind, within five years.

About 500 patients have asked about taking part in the NIH study. It starts with a hospitalization for blood and genetic tests, brain imaging scans, as well as other things. Researchers will examine the results before deciding who to invite back for a longer visit.

In this Nov. 20, 2019 image from video, Zach Ault is fitted with an EEG cap which uses electrodes to track the electrical activity of his brain, at the National Institutes of Health's hospital in Bethesda, Md. (AP Photo/Federica Narancio)
In this Nov. 20, 2019 image from video, Zach Ault is fitted with an EEG cap which uses electrodes to track the electrical activity of his brain, at the National Institutes of Health's hospital in Bethesda, Md. (AP Photo/Federica Narancio)

Zach Ault is one of the subjects in the study. Reporters from The Associated Press filmed Ault beginning a test on an exercise bicycle. "Go as far as you can, work as hard as you can," NIH physical therapist Bart Drinkard told Ault.

While Ault pedals the bike, scientists measure how his leg muscles use oxygen. Afterward, doctors fit a special cap on Ault's head to measure electrical activity in his brain. They then send him to spend the night in an air-tight chamber. Pipes remove air from the room for additional study. Scientists measure oxygen and carbon dioxide levels to tell how much energy Ault is using, minute by minute.

"We can calculate every molecule. It's the cleanest air we have in the hospital," said Kong Chen, a metabolism specialist at NIH. "We're figuring out how his body adjusts to an exercise load, or a stress load."

The study does not offer any treatments to people with chronic fatigue syndrome. But Ault says it did help him learn about the disease. And it gave him ideas about how to save up his energy.

"It's hard not knowing if I'm going to recover, if or when," he said.

Until research has an answer, he says he will "hope for the best but live for right now."

I'm John Russell.

Mike Stobbe reported on this story for the Associated Press. John Russell adapted it for VOA Learning English. George Grow was the editor.

Words in This Story

unique – n. used to say that something or someone is unlike anything or anyone else

invisible adj. unable to be seen; hidden

allow – v. to permit or let

diagnosis – n. the act of identifying a disease, illness, or problem by examining someone or something

exertion – n. physical or mental effort

bicycle – n. a vehicle with two wheels that is powered by two pedals

therapist – n. a treatment aide or specialist

pedal n. an instrument pressed by the foot when riding a bicycle or playing a musical instrument

metabolism – n. biology: the chemical processes by which a plant or an animal uses food or water to grow, heal amd make energy

consequencen. an effect, product or result

We want to hear from you. Write to us in the Comments Section.

网友的学习评论(0条):
版权所有©2003-2019 南京通享科技有限公司,保留所有权利。未经书面许可,严禁转载本站内容,违者追究法律责任。 互联网经营ICP证:苏B2-20120186
网站备案:苏ICP备05000269号-1中国工业和信息化部网站备案查询
广播台