题型：阅读理解 题类：常考题 难易度：普通
江苏省南通市海安高级中学2016-2017学年高二下学期英语期末考试试卷
Are you sick of going to bed late and waking up tired? Then grab your hiking boots and a tent. A new study suggests that camping in the great outdoors for a couple of days can reset your body clock and help you get more sleep.
The body clock is an internal system that tells our bodies when it's time to go to sleep and when it's time to wake up. Scientists track this clock by measuring the amount of melatonin (褪黑激素) circulating in a person's blood at any given time.
In a healthy sleeper, melatonin levels rise a few hours before bedtime, stay high through the night, and then settle back down when it's time to wake up.
In our modern society, however, most of us stay up many hours past sunset and would probably sleep in many hours after sunrise if we could. And the trouble is, your melatonin levels may still be high when your alarm clock goes off in the morning, which leads to fatigue. It may also have other health consequences as well, such as diabetes (糖尿病), overweight and heart disease.
Professor Kenneth Wright of the University of Colorado in the US wanted to see if our body clocks can be reset by a short stay in nature. His team recruited (招募) fourteen physically active volunteers in their 20s and 30s. Nine went on a weekend camping trip, while the other five stayed home. At the end of the weekend, the researchers reported that in just two days, the campers' body clocks had shifted so that their melatonin levels began to rise more than an hour earlier than they did before they left on the trip. By contrast, the body clocks of the group that stayed home shifted even later over the course of the weekend.
“This tells us we can reset our clocks fast,” Wright said.
Therefore, if you want to change your sleep patterns you could try to increase your exposure to natural light during the day and decrease the amount of artificial light you see at night. And if that doesn't work，there's always camping.
As you're busy with your studies, the weeks during the Spring Festival can be a time when training and healthy eating plans go out of the window. But you can continue running and avoid weight gain during the holiday season. {#blank#}1{#/blank#}
Pick a race
Having a race on your calendar is a motivation to keep running during the holiday. {#blank#}2{#/blank#} Check our active.com or Running in the city for events near you.
Don't skip breakfast
If you're going to a holiday party in the evening, don't make the mistake of skipping breakfast. You may think you're saving calories for later. {#blank#}3{#/blank#}
Bring your own healthy dishes
Chances are that most of the dishes at holiday gatherings are going be high in taste and calories. Bring your own healthy appetizers to the party. The host will appreciate it, and you know where will be at least one wise choice on the buffet table.
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If you are heading to an evening event, eat regular meals and snacks every few hours until party time. You won't arrive at the party ready to attack appetizers. Make sure you include fiber at each meal because it keeps you full longer.
Plan your runs
It's easy to say that you'll keep running regularly during the holiday season, but sticking to it requires a strategy. Schedule your runs like appointments, so you make them the first thing during a busy week. {#blank#}5{#/blank#}
A. Treat yourself B. Eat small meals C. Try some or all of these strategies. D. In fact, it may lead to overeating later in the day. E. Buy yourself a gift of some new running shoes and clothes. F. If you have runs scheduled, you are more likely to get them done. G. Once you choose one that is in a few weeks, set a plan and stick to it. |
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