体重超过正常值20%以上即为肥胖【正常成人体重(千克)=身高(厘米)-100】。任何年龄均可发生肥胖,但以中年人多见,且女性较男性为多。肥胖者大多为单纯性(营养性)肥胖,部分为病理性,多与神经内分泌或代谢异常有关。而消瘦则是指体重低于正常体重10%以上。消瘦可能是生理性的,特点是一贯消瘦,体重长期保持稳定。如果消瘦是新出现的情况,则必须引起重视。 Weight more than 20% of normal body weight is obesity [normal adult weight (kg) = height (cm) -100】. Obesity can occur at any age, but more common in middle-aged, and more women than men. Obese mostly simple (nutritional) obesity, partly pathological, and more neuroendocrine or metabolic abnormalities. And weight loss refers to the body weight below 10% of normal body weight. Weight loss may be physiological, is characterized by consistent weight loss, long-term weight stability. If weight loss is new, it must be taken seriously.