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The Journal of Sports Medicine and Physical Fitness 2021 Jan 20

DOI: 10.23736/S0022-4707.21.11278-2


lingua: Inglese

Comparative analysis of BIA, IBC, and DXA for determining body fat in American Football players

Majid M. SYED-ABDUL , Dhwani S. SONI, Jeremy T. BARNES, Jason D. WAGGANER

Department of Kinesiology, Nutrition, and Recreation, Southeast Missouri State University, Cape Girardeau, MO, USA


BACKGROUND: Body composition is frequently measured by sports, fitness, and healthcare professionals. Dual-Energy X-ray Absorptiometry (DXA) analysis is a validated measurement of body composition and is considered a criterion or “gold-standard” measurement. However, due to long scan times, accessibility and cost, conducting DXA scans on larger athletes (i.e., football players) is difficult. Hence fitness professionals, notably strength and conditioning coaches, typically use other methods to measure body composition. The purpose of this study was to assess the accuracy the Bioelectrical Impedance Analysis (BIA) and Integrative Body Composition (IBC) techniques to DXA body fat percent (BF%) in collegiate American Football players.
METHODS: Participants performed all three modes of body composition measurement: DXA, BIA [BIA-A (Athlete) and BIA-NA (Non-Athlete modes), and IBC, on the same day during early morning hours in a fasted state.
RESULTS: The BF% measured via all methods significantly correlated with BF% measured via DXA [i.e., BIA-A (P<0.001, r=0.903), BIA-NA (P<0.001, r=0.891), and IBC (P<0.001, r=0.867)]. However, values obtained via BIA-A (Athlete) (P<0.001) and IBC (P <0.001) methods under predicted BF%.
CONCLUSIONS: BIA and IBC can be used as an alternative to DXA for measuring BF% in American Football players. The BIA-A and IBC under predicted BF% compare to DXA, therefore, a correction formula can be utilized by coaches and athletes to more accurately predict BF % when using IBC and BIA-A methods in American Football players.

KEY WORDS: Dual energy x-ray absorptiometry; Integrative body composition; Bioelectrical impedance analysis; Body composition; Football players

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