2 . Why Is Exercise Cool?

•Exercise Strengthens Muscles

Did you ever do a push-up or swing across the monkey bars at the playground?    1    By using your muscles to do powerful things, you can make them stronger. For older teens and adults, this kind of workout can make muscles bigger, too.

•    2    

Can you touch your toes easily without yelling ouch? Most kids are pretty flexible, which means that they can bend and stretch their bodies without much trouble. Being flexible is having “full range of motion”, which means you can move your arms and legs freely without feeling tightness or pain.

•Exercise Keeps the Balance

    3    Your body needs a certain amount of calories every day just to function, breathe, walk around, and do all the basic things.    4    If you’re not very active, your body won’t need as many calories. Whatever your calorie need is, if you eat enough to meet that need, your body weight will stay about the same. If you eat more calories than your body needs, it may be stored as extra fat.

•Exercise Makes You Feel good

It feels good to have a strong, flexible body that can do all the activities you enjoy—like running, jumping and playing with your friends. It’s also fun to be good at something, like scoring a basket, hitting a home run, or perfecting a dive.

But you may not know that exercising can actually put you in a better mood.    5    It’s just another reason why exercise is cool!

A．Exercise Makes You Flexible

B．Exercise Makes Your Heart Happy

C．Those are exercises that can build strength.

D．So you want to do some aerobic (有氧的) exercise right now?

E．But if you’re active, your body needs an extra measure of calories or energy.

F．Food gives your body fuel in the form of calories, which are a kind of energy.

G．When you exercise, your brain releases a chemical which may make you feel happier.

3 . 阅读下面材料， 在空白处填写 l 个适当的单词或用括号内单词的正确形式。

On a quiet morning, about 70 people were practicing the ancient art of tai chi, outside of the library in Salt Lake City, Utah. They are not    1     well-trained   group of exercisers,   but rather a class of participants who are    2    (most) homeless. The class focuses    3     (little) on mastering the exercise and more on    4    (build) a community. People have said the class relieves their stress, encourages them to get into a routine and make new friends.

Bernie   and Marita Hart, a    5    (retire) couple, began to run the free program   three years ago. They started it by approaching   homeless people    6     were pushing grocery carts near the Salt Lake City Public Library and inviting them to try    7     Hart said her   favorite part of the program has been watching the friendships among participants. They love seeing the positive impact the class    8    (have) on people's lives.

When the Harts are out of town, tai chi does not stop. Attendees take turns teaching the classes.

"Homeless people    9    (tell) what to do every place they go, but we want to encourage them   to   be    10    (leader)," Bernie   Hart   said. "They   don't   need   sympathy,   they   need something that works."

4 . Race walking shares many fitness benefits with running, research shows, while most likely contributing to fewer injuries. It does, however, have its own problem.

Race walkers are conditioned athletes. The longest track and field event at the Summer Olympics is the 50-kilometer race walk, which is about five miles longer than the marathon. But the sport’s rules require that a race walker’s knees stay straight through most of the leg swing and one foot remain in contact (接触) with the ground at all times. It’s this strange form that makes race walking such an attractive activity, however, says Jaclyn Norberg, an assistant professor of exercise science at Salem State University in Salem, Mass.

Like running, race walking is physically demanding, she says, According to most calculations, race walkers moving at a pace of six miles per hour would burn about 800 calories(卡路里) per hour, which is approximately twice as many as they would burn walking, although fewer than running, which would probably burn about 1,000 or more calories per hour.

However, race walking does not pound the body as much as running does, Dr. Norberg says. According to her research, runners hit the ground with as much as four times their body weight per step, while race walkers, who do not leave the ground, create only about 1.4 times their body weight with each step.

As a result, she says, some of the injuries associated with running, such as runner’s knee, are uncommon among race walkers. But the sport’s strange form does place considerable stress on the ankles and hips, so people with a history of such injuries might want to be cautious in adopting the sport. In fact, anyone wishing to try race walking should probably first consult a coach or experienced racer to learn proper technique, she says. It takes some practice.

1. Why are race walkers conditioned athletes?

A．They must run long distances.

B．They are qualified for the marathon.

C．They have to follow special rules.

D．They are good at swinging their legs.

2. What advantage does race walking have over running?

A．It’s more popular at the Olympics.

B．It’s less challenging physically.

C．It’s more effective in body building.

D．It’s less likely to cause knee injuries.

3. What is Dr. Norberg’s suggestion for someone trying race walking?

A．Getting experts’ opinions.

B．Having a medical checkup.

C．Hiring an experienced coach.

D．Doing regular exercises.

4. Which word best describes the author’s attitude to race walking?

A．Skeptical.	B．Objective.
C．Tolerant.	D．Conservative.

5 . 阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。

According to a review of evidence in a medical journal, runners live three years     1    (long) than non-runners. You don't have to run fast or for long    2    (see)the benefit. You may drink, smoke, be overweight and still reduce your risk of     3     (die) early by running. While running regularly can't make you live forever, the review says it     4     (be) more effective at lengthening life    5     walking, cycling or swimming. Two of the authors of the review also made a study published in 2014    6    showed a mere five to 10 minutes A day of running reduced the risk of heart disease and early deaths from all     7    (cause).

The best exercise is one that you enjoy and will do. But otherwise…   it's probably running. To avoid knee pain, you can run on soft surfaces, do exercises to    8    (strength)your leg muscles(肌肉),avoid hills and get good running shoes. Running is cheap, easy and it's always    9    (energy).If you are time poor, you need run for only half the time to get the same benefits as other sports, so perhaps we should all give    10    a try.

6 . If you are already making the time to exercise, it is good indeed! With such busy lives, it can be hard to try and find the time to work out.     1     Working out in the morning provides additional benefits beyond being physically fit.

Your productivity is improved. Exercising makes you more awake and ready to handle whatever is ahead of you for the day.     2    

Your metabolism(新陈代谢) gets a head start.     3     If you work out in the mornings, then you will be getting the calorie(卡路里) burning benefits for the whole day, not in your sleep.

    4     Studies found that people who woke up early for exercise slept better than those who exercised in the evening. Exercise energizes you, so it is more difficult to relax and have a peaceful sleep when you are very excited.

    5     If you work out bright and early in the morning, you will be more likely to stick to healthy food choices throughout the day. Who would want to ruin their good workout by eating junk food? You will want to continue to focus on positive choices.

There are a lot of benefits to working out, especially in the mornings. Set your alarm clock an hour early and push yourself to work out! You will feel energized all day long.

A．You will stick to your diet.

B．Your quality of sleep improves.

C．You prefer healthy food to fast food.

D．There is no reason you should exercise in the morning.

E．You can keep your head clear for 4-10 hours after exercise.

F．After you exercise, you continue to burn calories throughout the day.

G．If you are planning to do exercise regularly, or you’re doing it now, then listen up!

7 . Training for a marathon (马拉松) requires careful preparation and steady, gradual increases in the length of the runs.     1    , buy the best-fitting running shoes you can find. No one can say which brand will work best for you or feel best on your feet, so you have to rely on your experience and on the feel of each pair as you shop. When you have found shoes that seem right, walk in them for a few days to double-check the fit.     2    . As always, you should stretch (伸展) at least ten minutes before each run to prevent injuries.

During the first week, do not think about distance, but run five minutes longer each day.     3    , it is wise to take a day off to rest. But during the next week, set a goal of at least a mile and a half per run.     4    . After two weeks, start timing yourself.     5    . Depending on the kind of race you plan to enter, you can set up a timetable for the remaining weeks before the race.

A．After six days

B．For a good marathon runner

C．Before you begin your training

D．With each day, increase the distance by a half mile

E．If they still feel good, you can begin running in them

F．Time spent for preparation raises the quality of training

G．Now you are ready to figure out a goal of improving distance and time