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[audioFiles]2013w28/audio_ezfj_001_20138[/audioFiles]

游客2023-11-12  49
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答案                                 Exercise
    Exercise not only improves your appearance./ It can also improve your health./ Exercise helps to reduce the risk of some diseases. /
    The C. D. C. defines physical activity as anything that gets your body moving./ And, it says there are two separate, / but equally important kinds of physical activity. / Aerobic or cardio exercise gets your heart rate going faster and increases your breathing. /Some examples are activities like walking at an increased speed, dancing, swimming or riding a bicycle./
    Muscle-strengthening activities help build and strengthen muscle groups in the body. /This kind of exercise includes things like lifting weights, / or doing sit-ups and push-ups. /
    To get the most from your exercise plan, / experts say adults should get at least two and a half hours of aerobic exercise each week. / More intense activities reduce the suggested amount of time to one hour and fifteen minutes. / Examples are playing basketball, swimming and distance running./
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