Everyone knows that exercise is important. We all need to exercise. Doctors say it is good for us. 【小题1】. Children who often exercise are more alert (灵活的). This means they do better in tests and schoolwork than those who don't exercise.

There are many ways to exercise. 【小题2】. Make sure you exercise in the following ways: you have to like what you're doing. Exercise enough but not too much. It's best to exercise twice each week. 【小题3】. Try all kinds of things until you find one, two or even three sports that feel right for you.

You can exercise at fitness centers (健身中心). They have a lot of equipment (设备) there. 【小题4】. Some people buy equipment for their homes. But it is very expensive.

Exercising can be fun. 【小题5】. Or they can play sports together. How do you exercise?

Many children like to go hiking （徒步旅行）.Why? Because they can be free from school and their homework. They can also enjoy beautiful nature, play with friends or family. If you want to have a happy hike, you must pay attention to the following:

First, find a good day. Fine weather is the most important for a happy hike. If the weather is good, you can do a lot of things, like riding horses, going bike riding, swimming in the river, flying kites and playing ball games.

Second, go with the people you like. If you go hiking with the people you don’t like, you won't have a great time. So, find the person who has the same interest as you.

Third, find the right place. Different people have different ideas about the places. For me, I would like to go to the beach for a hike. I like to walk along the beach, listening to the sound of the sea and watch children playing.

Lastly, think of what you need to prepare before going hiking. To have a nice hike, you must have comfortable shoes, enough water and some food. Now you can go hiking!

More and more people like bicycling and it is no surprise. It is fun, healthy and good for the environment. Maybe that’s why there are 1.4 billion bicycles and only 400 million cars on roads worldwide today. Bikes can take you almost anywhere, and there is no oil cost!

Get on a bicycle and ride around your neighbourhood. You may discover something new all around you. Stopping and getting off a bike is easier than stopping and getting out of your car. You can bike to work and benefit (受益) from the enjoyable exercise without polluting the environment. You don’t even have to ride all the way.

Folding (折叠) bikes work well for people who ride the train. Just fold the bike and take it with you. You can do the same on an airplane. A folding bike can be packed in a suitcase. You can also take a common bike with you when you fly. But be sure to look for information by getting on airline websites. Not all airlines are bicycle-friendly to travellers.