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运动前喝甜菜汁可以让大脑更年轻

较难

高中一年级

说明文

健康与饮食

研究表明，在运动前喝点甜菜汁会让人的大脑更加年轻，反应更加迅速。

Drinking beetroot(甜菜) juice before exercise could take years off your brain. Combining the drink with exercise strengthens certain regions of the brain, making it appear more youthful and potentially preventing the organ’s decline. This finding could help people who are at the risk of brain deterioration(恶化) to remain functionally independent, such as those with a family history who have suffer from the brain damage. Beetroot juice’s power likely lies in its nitric oxide content(一氧化氮含量), which both increases blood flow to the brain and improves exercise performance.

Study author Professor Jack Rejeski said, “Nitric oxide is a really powerful material. It goes to the areas of the body which need oxygen, and the brain is a heavy feeder of oxygen in your body. Compared to exercise alone, adding a beetroot juice supplement to exercise resulted in brain improvement that closely resembles what you see in younger adults.”

Scientists from Wake Forest University, North Carolina, studied 26 men and women aged 55 and older who did not exercise and had high blood pressure. Some participants were given beetroot juice one hour before walking for 50 minutes without having a rest, while others did the same exercise but without the drink. This was repeated three times a week for six weeks. Those who drank the juice had healthier brains, including the regions involved in movement, emotion and cognitive function.

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1 . What does the underlined phrase “This finding” refer to?

A.

The benefits drinking beetroot brings in.

B.

Certain regions of the brain growing large.

C.

Drinking a lot of water before exercise.

D.

Preventing the organ's decline is impossible.

2 . Why does the beetroot juice improve the brain improvement?

A.

Because it includes nitric oxide.

B.

Because it brings the risk of brain deterioration.

C.

Because it reduces the exercise.

D.

Because it stops the blood flow in the brain.

3 . How many times did the participants exercise in the test?

A.

3 times.

B.

6 times.

C.

12 times.

D.

18 times.

4 . Where can you find the article?

A.

In a travel guide.

B.

In a weather magazine.

C.

In a science magazine.

D.

In a science fiction.

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