Exercise is very important for weight loss and keeping healthy. Without proper exercise, your body will not burn off the extra calories(卡路里) and fats. Some people are worried about when to eat before and after exercising. It is best to eat more than two hours but less than four hours before exercising. High fat or sugar meals are not recommended before exercising. Drinking water before exercising is very important. People can eat whenever they want after exercising. It is a personal decision.

Exercising will increase your body's metabolism(新陈代谢) throughout the day, and up to 24 hours after exercising. There is not a certain time to exercise that is better than others, but it is sometimes best to exercise in the morning. You get an energy burst throughout the day.

Why is exercise so important? It will help with problems such as sleep disorders and high blood-fat levels. Exercising often can improve your body image and increase your energy level. It also helps to control weight.

Exercise should be performed three to five times per week. Little by little you can increase that to six or seven. And you'd better do physical exercise for30 minutes each tine.

There are two types of exercises——aerobic and anaerobic. Aerobic means" with oxygen" . This type of exercise requires a lot of oxygen. When trying to lose weight, aerobic exercises are the best to start with. With this type of exercise, you burn more calories and can start to lose weight.

Walking is a great primary exercise. It is aerobic, you don't need any equipment and it can be performed anywhere. Make sure you are walking at a god speed to raise your heart rate(速率). Jogging is also a good exercise. It produces faster weight-loss. Aerobics is a fun way to exercise. It is a good workout choice.

【小题1】What doesn't the writer mention in this passage when talking about exercise?

A．Age.

B．Food.

C．Time. .

D．Importance.

【小题2】What can we infer if exercising in the morning?

A．We are very tired.	B．We are more energetic.
C．We should get up early.	D．We are very hungry.

【小题3】What does the underlined word " anaerobic " most probably mean in Paragraph 5?

A．Physical exercises.	B．Sports competition.
C．Body training.	D．With no oxygen.

【小题4】What will the writer talk about if there is one more paragraph?

A．A good speed.	B．Sports equipment.
C．Anaerobic exercises.	D．Mental activities.

【小题5】What's the best title of this passage?

A．Physical Exercises	B．Weight Loss
C．Aerobic Exercises	D．Tips for Exercises