Validity and Reliability of A-Mode Ultrasound for Body Composition Assessment of NCAA Division I Athletes.
Validity and Reliability of A-Mode Ultrasound for Body Composition Assessment of NCAA Division I Athletes.
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A模式超声对NCAA I师I运动员的身体组成评估的有效性和可靠性。
DOI：
10.1371/journal.pone.0153146
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发表时间：
2016
期刊：
影响因子：
3.7
通讯作者：
Clark NW
中科院分区：
文献类型：
--
作者：
Wagner DR;Cain DL;Clark NW
本研究通过将 BodyMetrix™ BX2000 A 型超声与皮褶和 BOD POD 进行比较，评估了 BodyMetrix™ BX2000 A 型超声在估算运动员体脂百分比 (%BF) 方面的有效性和可靠性。 45 名（22 名男性，23 名女性）美国大学体育协会 (NCAA) I 级运动员自愿参加这项研究。受试者在 BOD POD 中测量一次，然后由两名技术人员测量皮褶和超声波两次。单向重复测量方差分析显示身体成分方法之间存在显着差异（F = 13.24，p < 0.01，η² = 0.24）。这种差异可以通过性别特异性效应进一步解释，即超声和 BOD POD 之间的平均差异对于女性来说较大 (~ 5% BF)，但对于男性来说很小 (~ 1.5% BF)。使用超声 %BF 估计值预测 BOD POD %BF 的线性回归得出 R2 = 0.849、SEE = 2.6% BF 和 TE = 4.4% BF。皮褶的评估者组内相关性 (ICC) 为 0.966，95% 置信区间 (CI) 为 0.328 至 0.991。超声的评估者间 ICC 为 0.987，95% CI 更小，为 0.976 至 0.993。皮褶和超声检查的 ICC 重测值均≥ 0.996。 BX2000超声设备具有优异的重测信度，其评估者间信度优于皮褶法。这种方法的有效性值得怀疑，特别是对于女运动员而言。然而，由于其出色的可靠性，教练和训练员应该考虑这种便携式且易于使用的 A 型超声波来评估运动员的身体成分变化。
This study evaluated the validity and reliability of the BodyMetrix™ BX2000 A-mode ultrasound for estimating percent body fat (%BF) in athletes by comparing it to skinfolds and the BOD POD. Forty-five (22 males, 23 females) National Collegiate Athletic Association (NCAA) Division-I athletes volunteered for this study. Subjects were measured once in the BOD POD then twice by two technicians for skinfolds and ultrasound. A one-way repeated-measures ANOVA revealed significant differences between body composition methods (F = 13.24, p < 0.01, η² = 0.24). This difference was further explained by a sex-specific effect such that the mean difference between ultrasound and BOD POD was large for females (~ 5% BF) but small for males (~ 1.5% BF). Linear regression using the %BF estimate from ultrasound to predict %BF from BOD POD resulted in an R2 = 0.849, SEE = 2.6% BF and a TE = 4.4% BF. The inter-rater intraclass correlation (ICC) for skinfold was 0.966 with a large 95% confidence interval (CI) of 0.328 to 0.991. The inter-rater ICC for ultrasound was 0.987 with a much smaller 95% CI of 0.976 to 0.993. Both skinfolds and ultrasound had test-retest ICCs ≥ 0.996. The BX2000 ultrasound device had excellent test-retest reliability, and its inter-rater reliability was superior to the skinfold method. The validity of this method is questionable, particularly for female athletes. However, due to its excellent reliability, coaches and trainers should consider this portable and easy to use A-mode ultrasound to assess body composition changes in athletes.