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When most people think about changing their body shape, they usually focus on just losing weight. Books and magazines about diet

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问题     When most people think about changing their body shape, they usually focus on just losing weight. Books and magazines about dieting are among the most popular in the world. Dieting is an important part of staying fit and healthy, but losing weight by means of dieting takes time; losing weight too fast can cause great health problems. Dieting means change one’s eating habits to a healthier pattern, but many women mistake the concept of dieting and thinking that the less one eats, the better. As a result, they lose health as well as weight.
    Aerobic exercise is a moderate intensity workout that, over a certain period of time, will provide the body’s use of oxygen. Nowadays, aerobic exercise has become a very trendy workout among youths. Not only is performing aerobic exercise interesting, but it is also very beneficial for health. There are different types of aerobics like jogging, swimming, kickboxing, fitness walking, inline skating, bicycling, etc. Aerobics strengthens the heart and lungs. It is also especially popular with women.
    But neither of these two methods, dieting and aerobics, can help shape the body. To do this, you need to build muscle. So, if a firmer and shapelier body is your goal, 60 percent of your exercise routine should involve strengthening moves, and only 30 percent should be aerobic exercises.
    For a proper body-shaping routine, you should plan three strength-training sessions a week with weights. Use weights which are as heavy as possible while still allowing you to do 8 to 12 reps of each exercise. Do one to three exercises for each muscle group—for example, chest and biceps, or back, shoulders and triceps.
    You should combine this with fast-paced aerobics activities, like swimming, cycling, walking, running, or in-line skating. Plan three to four workouts a week, 15 to 20 minutes each, increasing the pace each week.
    As you build muscle, you may find that you gain weight in spite of all of your calorie-bumim; exercise. Don’t worry. It’s probably muscle, which is denser than fat. And muscle is also a calorie-burning tissue. With more muscle, you can burn more calories, even when you are not exercising.
    When you are trying to build muscle, you need two to three servings of protein a day, but the main part of your diet should be carbohydrates. And in order to get the energy you need for a high-intensity workout, you should eat something, especially carbohydrates, an hour or so before your workout.
    While weight training will firm and shape your body, it has other benefits too. It improves bone and muscle strength and burns calories, leading to improved health and a higher quality of life.
What’s the ultimate purpose of strength-training with weights?
选项 A、To increase the pace of your aerobic exercise.
B、To burn more calories and lose weight.
C、To build muscle and lose weight.
D、To shape your body and make your life more enjoyable.
答案D
解析 由文中的叙述可知weight-training “firm and shape your body”并且“leading to improved health and a higher quality of life”，既可以塑形又可以提高生活质量。故答案为D。
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