为了解佤族三大方言族群身体组成成分的特点与差异，本研究采用生物电阻抗法对佤族三大方言族群的阿佤564例、巴饶克佤927例、佤佤505例样本的体质量、体脂率等18项指标进行测量。统计结果显示：1）三大方言族群的内脏脂肪等级均与年龄呈正相关；体质量、总肌肉量、推定骨量、总能量代谢、躯干肌肉量与年龄呈负相关。2）三大方言族群的成人多为下肢脂肪率最高，躯干脂肪率次之，上肢脂肪率最低；躯干肌肉量最高，下肢肌肉量次之，上肢肌肉量最低。3）三大方言族群脂肪特征的差异更明显，佤佤族群的脂肪率和内脏脂肪等级更高，脂肪更丰富。相比于男性，三大方言族群女性的肌肉量和骨量差异较大，主要表现为阿佤族群女性总肌肉量、上肢和躯干肌肉量、推定骨量值最大。

In order to understand the characteristics and differences of body composition among the three dialect branches of the Va ethnic group, 18 body composition indexes, including mass and percent body fat, were measured in 564 of A Va, 927 of Baraoke Va and 505 of Va Va by bioelectrical impedance analysis, BIA. The results were as follows: 1) The visceral fat level of the three dialect groups was positively correlated with age. Mass, total body muscle mass, estimated bone mass, total energy metabolism and trunk muscle mass were negatively correlated with age. 2) Most of the adults of the three dialect groups had the highest fat percentage of lower limbs, followed by the trunk, and upper limbs was the lowest. The trunk muscle mass is the highest, followed by the lower limbs, the upper limb muscle mass is the least. 3) The differences of fat characteristics among the three dialect groups were more obvious, and the fat percentage and visceral fat level of the Va Va group were higher, and fat was more abundant. Compared with males, the muscle mass and bone mass of females in the three dialect groups were significantly different, mainly showing that the total body muscle mass, upper limb and trunk muscle mass and estimated bone mass of females in the A Va group were the largest.