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题型:阅读理解-阅读单选 难度:0.65 引用次数:201 题号:12597830

Sitting around doing nothing used to seem like one of the safest activities possible. Then a few years ago scientists discovered that sitting all clay causes harmful changes that increase your chances of meeting an early end. Even regular workouts didn't fix the ill effects of having your bottom in a chair all workday. Suddenly, sitting became public health enemy number one. However, a new research finds that tiny bursts of intense activity are enough to protect your body from the worst effects of your couch-bound lifestyle.

In the research, the scientists closely observed eight young, healthy volunteers as they sat around. On the first day of the experiment they simply lounged for six hours. On the second day they got up every hour and engaged in five rounds of four seconds of intense workouts on a specialized bike.

"Twenty seconds total exercise an hour sounds like nothing, but the data showed it made a big difference to the subjects' bodies. In short, they didn't exhibit the usual ill effects of having sat all day. This study is small, but it's still both hopeful and relevant. The results suggest that breaking up sitting with frequent exercise can undo some of the effects of being inactive," explains Gretchen Reynolds.

"While the study used a special type of bike developed by sports scientists, the researchers feel similar results are obtainable with home exercise equipment. However, you may have to work for a few more seconds to reach the same level of intensity. You should try to get your heart pumping to its maximum as quickly as possible to ensure the effect. When you find yourself sitting for most of the day, try to rise frequently and move as often during the day as possible and for as many seconds as you can manage," Reynolds concludes.

1. What does the new research find?
A.Regular workouts can extend your life.
B.Sitting all clay can cause permanent harm.
C.Sitting is a worst enemy for people's health.
D.Intense exercise can relieve the damage of sitting.
2. How did the researchers reach the conclusion?
A.By comparing figures.B.By analyzing phenomena.
C.By describing behaviors.D.By referring to documents.
3. What can we know from Reynolds' words?
A.The study still needs further experiments for data.
B.Reaching maximum heart rate should be the aim.
C.Working out at home is much less effective.
D.20 seconds' exercise is far from enough.
4. What can be the best title of the passage?
A.The Worst Health Problem Is Solved
B.Intense Activities Are Beneficial to Health
C.Just 4 Seconds' Exercise Makes a Big Difference
D.New Research Redefines a Healthy Lifestyle

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【推荐1】Exercise is an important part of staying healthy — both physically and mentally. Studies show that it can help strengthen the body’s natural defenses against disease.     1     For many people, it is also a part of their daily routine, making them feel better about themselves.

    2     However, because of the current restrictions and social distancing, some ways of exercising have changed or are simply gone. So, people are changing how they exercise during this coronavirus pandemic (新冠疫情).

Those who only exercise indoors might now consider moving their exercise routine outdoors.

    3     “Simply walk outside in nature,” Khabbaza said. “People can use this as an opportunity to exercise in other ways.” But in areas with stay-at-home orders or enforced social distancing, exercising outside may not be as simple as it sounds.     4    

Gyms, recreation centers and exercise studios are not open. So, some people are turning online to exercise. The physical fitness industry is also moving to online training. The Associated Press news agency contacted industry representatives and other people. Beth Berglin is the director of a charitable group in Miami, Florida. Before the pandemic, her exercise routine involved going to actual camp-style classes four mornings a week.     5     Instead, she is staying active through online classes.

A.So people fancy outdoor activities.
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C.But exercise does not just keep us healthy.
D.Getting enough exercise at difficult times is vital.
E.What if people are not allowed to go out due to the pandemic?
F.How do people change their exercise mode from indoor to online?
G.This is the advice of Joe Khabbaza, a heart specialist at the Cleveland Clinic in Ohio.
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【推荐2】Winter-swimming has become popular in Beijing. Three years ago, few people would go swimming in the city waters. But now there is a Winter-swimming Enthusiasts’ Club(冬泳爱好者协会) and it has more than 2, 000 members. The oldest is 84 years of age and the youngest is only 7. The members are from all ways of life. They may be workers, peasants, soldiers, teachers, students....

Though it is now the coldest part of the season and the water temperature in the city’s lakes is around 0°C, many winter-swimmers still swim in the icy waters, even when it is snowing. They enjoy themselves in the lake, while the people by the side of the lake are wearing heavy clothes.

Why are so many people interested in winter-swimming? Because winter-swimming can be good for one’s health.

Bei Sha is a good example. He is 69 years old, and he once suffered from heart trouble for 26 years. After ten years of winter-swimming he is now in good health. Scientists are now studying the effects of winter-swimming on health.

1. Among the winter-swimmers the oldest man is ________ years older than the youngest one.
A.91B.84
C.77D.7
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C.They are persons of different ages.
D.They are men and women, old and young.
3. Winter-swimming has become popular in Beijing because ________.
A.more and more people like to swim in winter
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D.winter-swimming does a lot of good to one’s health
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A.People in Beijing Like Swimming in Winter
B.Winter-swimming — A Craze(狂热) in Beijing
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D.Winter-swimmers Are Brave Men
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【推荐3】Many people want to know how to help kids be fitter. There are some steps only parents can take, but kids can take charge, too.     1    

1. Eat a variety of foods, especially fruits and vegetables.     2     In that case, you’re more likely to get the nutrients your body needs. Shoot for at least five servings of fruits and vegetables a day—two fruits and three vegetables.

2.     3     When you’re really thirsty, cold water is the No. 1 thirst-quencher (饮料). And there’s a reason your school cafeteria offers cartons of milk. Kids need calcium to grow strong bones, and milk is a great source of this mineral. Aim for 3 cups of milk per day, or its equivalent.

3. Listen to your body. What does it feel like to be full? When eating, notice how your body feels and when your stomach feels comfortably full.     4    

4. Limit screen time. Screen time is the amount of time you spend watching TV or DVDs, playing video games, and using the computer.     5     Try to spend no more than 2 hours a day on screen time.

5. Be active. One job is to figure out which activities you like best. Not everyone loves baseball or soccer. Maybe your passion is kickball, or dancing. Ask your parents to help you do your favorite activities regularly. Find ways to be active every day.

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D.If you, a kid, want to be fit, the following may be useful.
E.Go to bed early and get up early.
F.Drink water and milk most often.
G.The longer you spend on these sitting-down activities, the less time available for active stuff, like basketball, and swimming.
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