Burns Ryan, Hannon James C, Brusseau Timothy A, Shultz Barry, Eisenman Patricia
Department of Exercise and Sport Science, University of Utah, College of Health, 250 S. 1850 E., HPER North RM 241, Salt Lake City, UT 84112, USA.
J Obes. 2013;2013:912460. doi: 10.1155/2013/912460. Epub 2013 Mar 4.
Previous research suggests that use of BMI as a screening tool to assess health in youth has limitations. Valid alternative measures to assess body composition are needed to accurately identify children who are aerobically fit, which is an indicator of health status. The purpose of this study was to examine the associations between select anthropometric measures and cardiorespiratory fitness test performance in middle-school students.
Participants included 134 students (65 boys and 69 girls) recruited from the 6th, 7th, and 8th grades. Anthropometric measures consisted of BMI, waist circumference (WC), waist-to-height ratio (WHtR), and percent body fat estimated from two-site skinfolds (%BF-SKF), as well as the hand-held OMRON BIA device (%BF-BIA). Cardiorespiratory fitness tests included the one-mile run and PACER test. Data were collected on four separate testing days during the students' physical education classes.
There were statistically significant moderate correlations between the %BF estimations, WHtR, and cardiorespiratory fitness test scores in both genders (P < .001). BMI at best only displayed weak correlations with the cardiorespiratory fitness test scores.
The results suggest that alternative measures such as %BF-SKF, %BF-BIA, and WHtR may be more valid indicators of youth aerobic fitness lending to their preferred use over BMI.
先前的研究表明，使用体重指数（BMI）作为评估青少年健康状况的筛查工具存在局限性。需要有效的替代测量方法来评估身体成分，以准确识别有氧适能良好的儿童，这是健康状况的一个指标。本研究的目的是探讨中学学生特定人体测量指标与心肺适能测试成绩之间的关联。
参与者包括从六年级、七年级和八年级招募的134名学生（65名男生和69名女生）。人体测量指标包括BMI、腰围（WC）、腰高比（WHtR）、通过两点皮褶厚度估算的体脂百分比（%BF-SKF），以及手持式欧姆龙生物电阻抗分析仪测量的体脂百分比（%BF-BIA）。心肺适能测试包括一英里跑和20米往返跑测试。在学生体育课的四个不同测试日收集数据。
在两性中，%BF估算值、WHtR与心肺适能测试成绩之间均存在统计学上显著的中度相关性（P < .001）。BMI与心肺适能测试成绩之间充其量仅显示出微弱的相关性。
结果表明，诸如%BF-SKF、%BF-BIA和WHtR等替代测量方法可能是青少年有氧适能更有效的指标，因此比BMI更值得优先使用。
