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目的判断肥胖不能单纯用体质量而应根据体脂来判断。方法用生物电阻抗方法测定１２～１８岁中学生体内脂肪含量。结果用体质量和体脂两种方法测定肥胖发生率是有区别的，按体脂测定比按体质量测定肥胖发生率要高，但两种方法存在相关关系。用生物电阻抗法测定肥胖发生率：男性４０．８０％，女性２９．３４％，体质量正常体脂肥胖共５８名，其中５８．６２％（３４／５８）是女生，说明女性肥胖可能不表现在体质量上。体质量超重体脂测定正常的１３名，体质量肥胖而体脂正常的１名，在这１４名中７８．８％（１１／１４）是男生，说明这些男生肌肉发达，体格健壮。结论体脂是衡量肥胖的良好指标，体脂过量即是肥胖。
Purpose to determine the obesity can not simply use the body mass but should be judged according to body fat. Methods The bioelectrical impedance method was used to measure the body fat content of 12 ~ 18 years old middle school students. Results Body fat and body fat two methods to determine the incidence of obesity are different, according to body fat measured body mass than the incidence of obesity is higher, but there is a correlation between the two methods. The incidence of obesity was measured by the bioelectrical impedance method: 40.80% for males and 29.34% for females, and 58 bodies (58.62%, 34/58) of them were normal body fat and obesity, indicating that female obesity may not Performance in the body weight. Body weight overweight body fat determination of the normal 13, body fat and body fat normal 1, 78.8% (11/14) of these 14 were boys, indicating that these boys muscular, physically robust. Conclusion Body fat is a good measure of obesity, body fat is obesity.