Use of Bioelectrical Impedance to Assess Body Composition Changes at HighAltitude

摘要

This study determined the feasibility of using bioelectrical impedance analysis(BIA) to assess body composition alterations associated with body weight (BW) loss at high altitude. The BIA method was also evaluated relative to anthropometric assessments. Height, BW, BIA, skinfold (SF, 6 sites), and circumference (CIR, 5 sites) measurements were obtained from 16 males (2335 yr) before, during, and after 16 days of residence at 3,7004,300 m. Hydrostatic weighings (HW) were performed pre and postaltitude. Results of 13 previously derived prediction equations using various combinations of height, BW, age, BIA, SF, or CIR measurements as independent variables to predict fatfree mass (FFM), fat mass (FM), and percent body fat (%Fat) were compared with HW. Mean BW decreased from 84.74 to 78.84 kg (P < 0.01). As determined by HW, FFM decreased by 2.44 kg (P < 0.01), FM by 3.46 kg (P < 0.01), and %Fat by 3.02% (P < 0.01). anthropometry; bioelectrical impedance analyses; fat-free mass; weight loss.