Res Q Exerc Sport. 2014 Mar;85(1):59-67. doi: 10.1080/02701367.2013.872217.
The purpose of this study was to examine the impact of body mass index (BMI) on the agreement between aerobic capacity estimates from different Progressive Aerobic Cardiorespiratory Endurance Run (PACER) equations and the Mile Run Test.
The agreement between 2 different tests of aerobic capacity was examined on a large data set from 2 suburban school districts (n = 1,686 youth in Grades 3-10). Difference estimates between the Mile Run Test and several PACER equations were computed, and residuals were examined using cluster analysis. The implication of the discrepancy between these tests was also examined using FITNESSGRAM health-related standards for BMI. Comparisons were made against corresponding estimates of peak oxygen consumption from the Mile run because this equation is more established.
Results supported a 2-cluster solution. The discrepancy between tests was higher in participants with higher BMI scores (Z scores for residuals in this group ranged from -0.07 to 1.57). BMI was able to explain 30% to 34% of the disagreement between the Mile and different PACER equations of aerobic fitness. Classification analyses revealed that kappa scores were lower among PACER equations that do not include a BMI term (kappa = .12-.34 vs. .59-.81). Overall, the test-equating approach used in the Fitnessgram program to process PACER data had better agreement than alternative PACER equations that included BMI.
The results support the inclusion of BMI in prediction equations used to estimate aerobic capacity from the PACER.
本研究旨在探讨身体质量指数（BMI）对不同渐进性有氧运动心肺耐力跑（PACER）方程和英里跑测试估算的有氧能力之间的一致性的影响。
在来自 2 个郊区学区的大型数据集（3-10 年级的 1686 名青少年）上，检查了 2 种不同有氧能力测试之间的一致性。计算了英里跑测试与几种 PACER 方程之间的差异估计值，并使用聚类分析检查了残差。还使用 FITNESSGRAM 与 BMI 相关的健康标准检查了这些测试之间差异的含义。与英里跑得出的最大摄氧量的相应估计值进行了比较，因为这个方程更成熟。
结果支持 2 聚类解决方案。在 BMI 得分较高的参与者中，测试之间的差异较大（该组中残差的 Z 分数范围从-0.07 到 1.57）。BMI 可以解释 30%至 34%的英里跑和不同 PACER 有氧健身方程之间的差异。分类分析表明，不包含 BMI 项的 PACER 方程的kappa 值较低（kappa=0.12-0.34 比 0.59-0.81）。总体而言，Fitnessgram 程序中用于处理 PACER 数据的测试等效方法比包含 BMI 的替代 PACER 方程具有更好的一致性。
结果支持在使用 PACER 预测方程估算有氧能力时包含 BMI。
