Department of Sports Science and Clinical Biomechanics, SDU Sport and Health Sciences Cluster (SHSC), Faculty of Health Sciences, University of Southern Denmark, Odense, Denmark.
Department of Sport and Health Sciences, College of Life and Environmental Sciences, University of Exeter, Exeter, United Kingdom.
PLoS One. 2021 Mar 26;16(3):e0247362. doi: 10.1371/journal.pone.0247362. eCollection 2021.
The aim of this study was at examining the validity and reliability of a marketed bioimpedance (BIA) scale for body composition assessment, in children engaged in an educational football project (FIFA 11 for Health). One-hundred and twenty-seven children (70 boys and 57 girls; age 10.7±0.5 years, body mass 41.2±9.0 kg, Body mass index 18.5±3.3 kg·m-2 and stature 149±7 cm) were evaluated for total body mass, lean body mass, muscle mass, using BIA (InBody 270, Biospace, California, USA) and dual-energy X-ray absorptiometry (DEXA, Lunar Prodigy, GE Medical Systems, Madison, Wisconsin, USA), at baseline conditions. Data analyses were carried out separately for girls and boys. Nearly perfect associations (r = 0.97-0.99) and excellent absolute (TEM = 0.04-1.9%) and relative (ICC = 0.98-1.00) inter-device reliability were found between DEXA and BIA variables. Fat and lean body mass bias (p < .0001) were practically relevant both for the boys (2.56 and 11.22 kg, respectively) and the girls (2.33 and 10.49 kg, respectively). Muscle mass and body fat were underestimated and overestimated, respectively, for the boys and girls. InBody 270 is a valid BIA system for estimating body composition with an excellent inter-device relative and absolute reliability. However, the remarkable measurements bias of BIA fat and muscle mass values discourage its use for clinical prescription. The BIA body composition biases were sex dependent.
本研究旨在检验一种市售生物阻抗（BIA）秤在参与教育性足球项目（FIFA 11 for Health）的儿童中进行身体成分评估的有效性和可靠性。对 127 名儿童（70 名男孩和 57 名女孩；年龄 10.7±0.5 岁，体重 41.2±9.0kg，体重指数 18.5±3.3kg·m-2，身高 149±7cm）进行了全身总质量、瘦体质量、肌肉质量的评估，使用 BIA（InBody 270，Biospace，加利福尼亚州，美国）和双能 X 射线吸收法（DEXA，Lunar Prodigy，GE 医疗系统，威斯康星州麦迪逊市，美国），在基线条件下进行。数据分析分别针对女孩和男孩进行。在男孩和女孩中，DEXA 和 BIA 变量之间都存在近乎完美的相关性（r = 0.97-0.99）和极好的绝对（TEM = 0.04-1.9%）和相对（ICC = 0.98-1.00）设备间可靠性。男孩（分别为 2.56kg 和 11.22kg）和女孩（分别为 2.33kg 和 10.49kg）的脂肪和瘦体质量偏差（p <.0001）都具有实际意义。男孩和女孩的肌肉质量和体脂分别被低估和高估。InBody 270 是一种有效的 BIA 系统，用于估计身体成分，具有极好的设备间相对和绝对可靠性。然而，BIA 脂肪和肌肉质量值的显著测量偏差阻碍了其在临床处方中的使用。BIA 身体成分的偏差是性别依赖性的。
