A comparison of three bioelectrical impedance analyses for predicting lean body mass in a population with a large difference in muscularity

摘要: This study tested the hypothesis that, as compared to whole-body bioelectrical impedance (BI) analysis, segmental BI analysis can estimate lean body mass (LBM) more accurately in a population with large difference muscularity. In addition BI, which determines (Z) between wrist and ankle, two analyses determine Z value of every segment each (1) arms, legs trunk (distal BI) (2) upper (proximal were applied group 125 male athletes 75 non-athletes. The subjects divided into validation cross-validation groups. Simple multiple regression (length)2/Z (BI index) values for segment, develop prediction equations LBM measured using air-displacement plethysmography. group, SE estimation was similar (3.4 kg, 5.4%), distal 5.5%) proximal (3.3 5.2%) analyses. However, produced systematical errors estimates LBM. Moreover, residuals methods significantly (P<0.05) correlated ratios indices arms those legs, respectively, calculated variables approximating relative development tissues at area limbs. On other hand, validated cross-validated. Thus, accuracy estimating derived from use index combination error relating limb segments tissue development.