Beetroot juice 'boosts stamina' 甜菜根汁液可“提高精力”
文章来源:未知 文章作者:meng 发布时间:2009-08-07 05:35 字体: [ ]  进入论坛
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Drinking beetroot juice boosts stamina1 and could help people exercise for up to 16% longer, a UK study suggests.

一项英国调查显示,喝甜菜根汁液可以激发活力并使人们体力增强16%之多。

Nitrates seem to be the key ingredient in beetroot
Nitrates seem to be the key ingredient in beetroot

A University of Exeter team found nitrate(硝酸盐) contained in the vegetable leads to a reduction in oxygen uptake - making exercise less tiring.

The small Journal of Applied2 Physiology3 study suggests the effect is greater than that which can be achieved by regular training.

Beetroot juice has previously4 been shown to reduce blood pressure.

The researchers believe their findings could help people with cardiovascular(心脏血管的), respiratory(呼吸的) or metabolic5 diseases(代谢病) - and endurance(耐性) athletes.

They focused on eight men aged6 19-38, who were given 500ml per day of organic beetroot juice for six consecutive7 days(连续作业日,连续营业日) before completing a series of tests, involving cycling on an exercise bike.

On another occasion, they were given a placebo8(安慰剂) of blackcurrant(黑醋栗) cordial(兴奋剂,补品) for six consecutive days before completing the same cycling tests.

After drinking beetroot juice the group was able to cycle for an average of 11.25 minutes - 92 seconds longer than when they were given the placebo.

This would translate into an approximate 2% reduction in the time taken to cover a set distance.

The group that had consumed the beetroot juice also had lower resting blood pressure.

Mechanism9 unclear

The researchers are not yet sure of the exact mechanism that causes the nitrate(硝酸盐) in the beetroot juice to boost stamina.

However, they suspect it could be a result of the nitrate turning into nitric oxide10(氧化一氮) in the body, reducing how much oxygen is burned up by exercise.

Study researcher Professor Andy Jones - an adviser11 to top UK athlete Paula Radcliffe - said: "We were amazed by the effects of beetroot juice on oxygen uptake because these effects cannot be achieved by any other known means, including training.

"I am sure professional and amateur(业余的) athletes will be interested in the results of this research.

"I am also keen to explore the relevance12 of the findings to those people who suffer from poor fitness and may be able to use dietary supplements to help them go about their daily lives."

Professor John Brewer13, an expert on sports science at the University of Bedfordshire, said: "These findings are potentially exciting for many people involved in sport and, but will almost certainly require further more extensive studies before the exact benefits and mechanisms14 are understood.

"We must also remember that exercise and training and a sensible diet will always remain as the essential ingredients(作料,材料) for a balanced and healthy lifestyle."

Dr Simon Marshall, of the University of San Diego, has carried out work on exercise and health.

He said much more work was needed involving many more subjects to draw firm conclusions.

"Certainly, a diet high in nitrate-rich fruits and vegetables is good for your heart health and this study provides further evidence of this."



点击收听单词发音收听单词发音  

1 stamina br8yJ     
n.体力;精力;耐力
参考例句:
  • I lacked the stamina to run the whole length of the race.我没有跑完全程的耐力。
  • Giving up smoking had a magical effect on his stamina.戒烟神奇地增强了他的体力。
2 applied Tz2zXA     
adj.应用的;v.应用,适用
参考例句:
  • She plans to take a course in applied linguistics.她打算学习应用语言学课程。
  • This cream is best applied to the face at night.这种乳霜最好晚上擦脸用。
3 physiology uAfyL     
n.生理学,生理机能
参考例句:
  • He bought a book about physiology.他买了一本生理学方面的书。
  • He was awarded the Nobel Prize for achievements in physiology.他因生理学方面的建树而被授予诺贝尔奖。
4 previously bkzzzC     
adv.以前,先前(地)
参考例句:
  • The bicycle tyre blew out at a previously damaged point.自行车胎在以前损坏过的地方又爆开了。
  • Let me digress for a moment and explain what had happened previously.让我岔开一会儿,解释原先发生了什么。
5 metabolic 2R4z1     
adj.新陈代谢的
参考例句:
  • Impressive metabolic alternations have been undergone during embryogenesis.在胚胎发生期间经历了深刻的代谢变化。
  • A number of intoxicants are associated with metabolic acidosis.许多毒性物质可引起代谢性酸中毒。
6 aged 6zWzdI     
adj.年老的,陈年的
参考例句:
  • He had put on weight and aged a little.他胖了,也老点了。
  • He is aged,but his memory is still good.他已年老,然而记忆力还好。
7 consecutive DpPz0     
adj.连续的,联贯的,始终一贯的
参考例句:
  • It has rained for four consecutive days.已连续下了四天雨。
  • The policy of our Party is consecutive.我党的政策始终如一。
8 placebo placebo     
n.安慰剂;宽慰话
参考例句:
  • The placebo has been found to work with a lot of different cases.人们已发现安慰剂能在很多不同的病例中发挥作用。
  • The placebo effect refers to all the observable behaviors caused by placebo.安慰剂效应是指由安慰剂所引起的可观察的行为。
9 mechanism zCWxr     
n.机械装置;机构,结构
参考例句:
  • The bones and muscles are parts of the mechanism of the body.骨骼和肌肉是人体的组成部件。
  • The mechanism of the machine is very complicated.这台机器的结构是非常复杂的。
10 oxide K4dz8     
n.氧化物
参考例句:
  • Oxide is usually seen in our daily life.在我们的日常生活中氧化物很常见。
  • How can you get rid of this oxide coating?你们该怎样除去这些氧化皮?
11 adviser HznziU     
n.劝告者,顾问
参考例句:
  • They employed me as an adviser.他们聘请我当顾问。
  • Our department has engaged a foreign teacher as phonetic adviser.我们系已经聘请了一位外籍老师作为语音顾问。
12 relevance gVAxg     
n.中肯,适当,关联,相关性
参考例句:
  • Politicians' private lives have no relevance to their public roles.政治家的私生活与他们的公众角色不相关。
  • Her ideas have lost all relevance to the modern world.她的想法与现代社会完全脱节。
13 brewer brewer     
n. 啤酒制造者
参考例句:
  • Brewer is a very interesting man. 布鲁尔是一个很有趣的人。
  • I decided to quit my job to become a brewer. 我决定辞职,做一名酿酒人。
14 mechanisms d0db71d70348ef1c49f05f59097917b8     
n.机械( mechanism的名词复数 );机械装置;[生物学] 机制;机械作用
参考例句:
  • The research will provide direct insight into molecular mechanisms. 这项研究将使人能够直接地了解分子的机理。 来自《简明英汉词典》
  • He explained how the two mechanisms worked. 他解释这两台机械装置是如何工作的。 来自《简明英汉词典》
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