有氧健身在预防疾病方面，远不如拥有正常的身体质量指数重要。
Being aerobically fit was far less important than having a normal body mass index in preventing the disease.
2487名研究参与者都是体重超标或肥胖者，身体质量指数(BMI)在27至45之间(BMI正常值在18.5至24.9之间)。
The 2, 487 study participants were all either overweight or obese, with a BMI of 27 to 45 (a BMI of 18.5 to 24.9 is considered normal weight).
不过，这份医学报告的作者称，那些患有心脏病但身体质量指数有在正常范围之内的病人，如果他们腰围超标或腰围与臀围比例失调，医生应该尽量建议他们减肥减重。
However, the study authors say doctors should advise patients with heart disease with normal BMIs to shed weight if they have a large waist or high waist-to-hip ratio.
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