1. (2022高一上·哈尔滨月考) 阅读理解

Researchers have found that short and intense(剧烈的) stair climbing, which can be done almost anywhere, has great benefits for fitness.

The findings make the two most common excuses of couch potatoes untrue: no time and no access to the gym. "Stair climbing is a form of exercise anyone can do in their own home, after work or during the lunch hour," says Martin, a lead author of the study. "This research takes interval (间歇) training out of the lab and makes it possible for everyone."

Early studies have shown the benefits of stair climbing over continuous periods of time-up to 70 minutes a week, but researchers wanted to determine if interval training, which includes short and intense exercise separated by short periods of recovery, was a good way to improve heart fitness.

Researchers recruited(招募) 31 women and tested the effect of two different experiments, each of which required a 10-minute exercise period, including warm-up, cool-down and recovery periods. The exercise periods were done three times a week over the course of six weeks.

The first experiment included three, 20-second of continuous climbing in an "all-out" manner. The participants were then compared to those who went through the same experiment using an exercise bike which has already been shown to improve fitness.

For the second experiment, some women climbed up and down one flight of stairs for 60 seconds, an experiment which could be easily done at home.

Both experiments, each including a total time of 30 minutes a week, increased heart fitness, an important healthy marker that is connected with long life.

1. （1） What does Martin say about stair climbing?

   A . It saves lots of time. B . It is convenient for people to do. C . It requires special training. D . It is better than going to the gym.
3. （2） Why did researchers do the two experiments?

   A . To test the results of early studies. B . To encourage people to climb stairs. C . To prove the benefits of continuous stair climbing. D . To find out effect of interval training on heart fitness.
5. （3） What can we learn from the two experiments?

   A . The first one was better for fitness. B . The second one required less total time. C . Both of them were good for heart health. D . People in the second one turned out healthier.
7. （4） What is the best title for the text?

   A . How does stair climbing benefit people? B . Why is stair climbing the best exercise? C . Stair Climbing—A good way to increase fitness D . Simple stair climbing exercises you can do at home