Department of Kinesiology, Nutrition, and Recreation, Southeast Missouri State University, Cape Girardeau, MO, USA -
Department of Kinesiology, Nutrition, and Recreation, Southeast Missouri State University, Cape Girardeau, MO, USA.
J Sports Med Phys Fitness. 2021 May;61(5):687-692. doi: 10.23736/S0022-4707.21.11278-2. Epub 2021 Jan 20.
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 aim of this study was to assess the accuracy of the Bioelectrical Impedance Analysis (BIA) and Integrative Body Composition (IBC) techniques to DXA body fat percent (BF%) in collegiate American Football players.
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.
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%.
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 predict BF% more accurately compared to IBC and BIA-A methods in American Football players.
体成分经常由运动、健身和医疗保健专业人员测量。双能 X 射线吸收法（DXA）分析是体成分的一种经过验证的测量方法，被认为是一种标准或“金标准”测量方法。然而，由于扫描时间长、可及性和成本高，对较大的运动员（例如足球运动员）进行 DXA 扫描较为困难。因此，健身专业人员，尤其是力量和体能教练，通常使用其他方法来测量体成分。本研究旨在评估生物电阻抗分析（BIA）和综合体成分（IBC）技术在大学生美式足球运动员中测量体脂肪百分比（BF%）的准确性。
参与者在禁食状态下的清晨时段，同一天内完成了三种体成分测量模式：DXA、BIA（运动员模式 BIA-A 和非运动员模式 BIA-NA）和 IBC。
所有方法测量的 BF%与 DXA 测量的 BF%显著相关（即 BIA-A[P<0.001，r=0.903]、BIA-NA[P<0.001，r=0.891]和 IBC[P<0.001，r=0.867]）。然而，BIA-A（运动员）（P<0.001）和 IBC（P<0.001）方法获得的值低估了 BF%。
BIA 和 IBC 可替代 DXA 用于测量美式足球运动员的 BF%。BIA-A 和 IBC 低估了 BF%与 DXA 相比，因此，教练和运动员可以使用校正公式更准确地预测 BF%，而不是使用 IBC 和 BIA-A 方法。
