另一个缺点是它不适用于一些像运动员和健美运动员这样的肌肉发达的人，他们也可以有人为造成的身体质量指数偏高的情况。

Another shortcoming is that it is not applicable to certain very muscular people such as athletes and bodybuilders, who can also have artificially high BMIs.

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但是肌肉发达的人（如运动员）体质指数比较大，但不会有多余的脂肪。

People with a large amount of lean muscle mass, such as athletes, can show a large body mass index without having an unhealthy level of fat.

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因为在一个运动员的身上，肌肉的密度要比脂肪厚。如果根据BMI指数来算的话，那他就超重了。事实上，也许这些超出的重量是肌肉部分而不是脂肪部分。

Because muscle is denser than fat an athlete's BMI might indicate that he is overweight, but that extra weight might be composed more of muscle than fat.

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