1 . Running is often tiring and a lot of hard work, but nothing beats the feeling you get after finishing a long workout around the track.
But while it’s long been believed that endorphins (内啡肽) —chemicals in the body that cause happiness—are behind the so-called “runner’s high”, a study suggested that there may be more to this phenomenon than we previously knew.
According to a recent study published by a group of scientists from several German universities, a group of chemicals called endocannabinoids (内源性大麻素) may actually be responsible for this familiar great feeling.
To test this theory, the scientists turned to mice. Both mice and humans release high levels of endorphins and endocannabinoids after exercise. After exercising on running wheels, the mice seemed happy and relaxed and displayed no signs of anxiety. But after being given a drug to block their endorphins, the mice’s behavior didn’t seem to change. However, when their endocannabinoids were blocked with a different drug, their runners’ high symptoms seemed to fade.
“The long-held notion of endorphins being responsible for the runner’s high is false. Endorphins are effective pain relievers, but only when it comes to the pain in your body and muscles you feel after working out,” Patrick Lucas Austin wrote on science blog Lifchacker.
Similar studies are yet to be carried out on humans, but it’s already known that exercise is a highly effective way to get rid of stress or anxiety. The UK’s National Health Service even prescribes (开药 方) exercise to patients who are suffering from depression. “Being depressed can leave you feeling low in energy, which might put you off being more active. Regular exercise can improve your mood if you have depression, and its especially useful for people with mild to moderate (中等的) depression,” it wrote on its website.
It seems like nothing can beat that feeling we get after a good workout, even if we don’t fully understand where it comes from. At least if we’re feeling down, we know that all we have to do is to put on our running shoes.
1. What did scientists from German universities recently discover?| A．Working out is a highly effective way to treat depression. |
| B．The runner’s high could be caused by endocannabinoids. |
| C．Endorphins may contribute to one’s high spirits after running. |
| D．The level of endorphins and endocannabinoids could affect one’s mood. |
| A．To find what reduces the runner’s high symptoms. |
| B．To see the specific symptoms of the runner’s high. |
| C．To identify what is responsible for the runner’s high. |
| D．To test what influences the level of endocannabinoids released. |
| A．Effect. | B．Goal. | C．Opinion. | D．Question |
| A．They can help ease depression symptoms. |
| B．They are the best way to treat depression. |
| C．They only work for those with serious depression. |
| D．They can help people completely recover from depression. |
内容包括：
1.活动简介
2.你的感受
注意：1.词数80左右
2.可适当增加细节，以使行文连贯。
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1. Who is the man going to play golf with?
| A．His schoolmates. | B．The woman. | C．His workmates. |
| A．Learn to drive. |
| B．Do sports in a school gym. |
| C．Celebrate a special occasion. |
| A．He is not good at basketball. |
| B．He prefers doing exercise in the gym. |
| C．He is in a basketball team. |
| A．Boring. | B．Beneficial. | C．Challenging. |
4 . What is the best sport for your body type?
Just because someone has dreamt of playing football from childhood does not mean it is the best sport for him or her. Finding the sport your body is best suited to can make a big difference to how much you enjoy it and how good at it you are.
A person with an ectomorph body type is tall and slim with little fat or muscle. This person has narrow shoulders and hips, and thin arms and legs. Ectomorphs have difficulty putting on weight because of a fast metabolism (新陈代谢).
Mesomorph body types are the typical image of an athlete. Their arms and legs are muscular and they have broad shoulders and narrow hips. Mesomorphs can put on or lose weight easily and build muscle quickly.
A person who is an endomorph naturally carries more body fat. They are often short, with a high waist, and well developed upper arms and thighs.
It is important to note that the three body types are extremes. No one is 100% ectomorph or completely endomorph.
| A．Everyone is a bit of a mix |
| B．If you want to be a world champion |
| C．If a person with this body type is very tall |
| D．A person with this body type has more choice of sports |
| E．For the same reason, it takes them longer to build muscle |
| F．While it may seem that an endomorph will not be very athletic |
| G．Endomorphs must work a little harder to maintain a perfect body weight |
5 . Working out can help teenagers boost their grades, a new study suggests. Adolescents who routinely engaged in moderate to vigorous（剧烈的）exercise showed long-term improvements in their academic performance, the British Journal of Sports Medicine study reported.
“Our study suggests that the effect of physical activity may be quite large,” John Reilly, a professor at the University of Strathclyde said. The researchers looked at a sample of about 5000 children who were involved in a long-term study that tracks children born in the UK between 1991 and 1992. When children reached 11 years old, their daily physical activity levels were measured using an accelerometer（加速器）for three to seven days. The device, similar to a pedometer（计步器）tracking the number of steps taken, recorded the average time children exercised, which was 29 minutes a day for boys and 18 for girls.
“The actual levels of daily physical activity at age 11 were quite low,” Mr. Reilly noted. The children had their academic performance tested at ages 11 and 13 with compulsory national tests for students, and also at 15 or 16 with the General Certificate of Secondary Education (GCSE) exam. The tests assessed the children’s abilities in English, math and science subjects. The results showed that the more children participated in moderate to vigorous physical activity, the higher their test scores were at age 11 in all three subjects. For girls, science scores were most strongly linked to exercise.
When children were tested again at age 13, their academic scores were still linked to how much they had exercised when they were 11 years old. By the time the youngsters took the GCSE exam, each 17-minute-per‑day increase in physical activity for the boys was linked to an improvement in their scores. Every additional 12-minute increase a day in exercise for the girls was also linked to an increased score, especially in the science category.
The researchers have called for more studies to look at the possible academic benefits that could be derived if students exercised the recommended 60 minutes or more a day.
1. What’s the study about?| A．The influence of exercise on students’ scores. |
| B．The secrets of students’ ranking high in class. |
| C．The causes of students’ participating in sports. |
| D．The ways of improving students’ physical conditions. |
| A．To record how long students exercise. |
| B．To record the walking speed of students. |
| C．To record how many steps students walk. |
| D．To record the number of calories students consume. |
| A．Students at age 11 do more exercise than at other ages. |
| B．Boys at age 13 get more benefits by doing more exercise. |
| C．Girls’ science scores are more closely related to exercise. |
| D．More and more students do exercise to improve their scores. |
| A．adopted. | B．acquired. |
| C．concluded. | D．displayed. |
