Nemeth Blaise A, Carrel Aaron L, Eickhoff Jens, Clark R Randall, Peterson Susan E, Allen David B
Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA.
J Pediatr. 2009 May;154(5):677-81. doi: 10.1016/j.jpeds.2008.11.032. Epub 2009 Jan 23.
To demonstrate the ability of a submaximal test to predict VO(2max) in overweight children.
A total of 130 children, 11 to 14 years old, with body mass index >85 percentile for age and sex performed a submaximal walking test. VO(2max) was measured by using open circuit spirometry during a graded exercise test to volitional fatigue. An equation to predict VO(2max) was modeled by using the variables of sex, weight (kg), height (cm), heart rate (HR) after 4 minutes during the submaximal test (4minHR), HR difference (4minHR - resting HR), and submaximal treadmill speed (miles per hour [mph]) in 75% of the subjects. Validation was performed by using the remaining 25% of subjects.
A total of 113 subjects achieved a maximal effort and was used in the statistical analysis. Development and validation groups were similar in all aspects. On validation, the mean square error was 241.06 with the predicted VO(2max) within 10% of the observed value in 67% of subjects.
VO(2max) was accurately predicted in this cohort of overweight children by using a submaximal, treadmill-based testing protocol.
验证次极量测试预测超重儿童最大摄氧量（VO₂max）的能力。
共有130名11至14岁、体重指数高于同年龄和性别的第85百分位数的儿童进行了次极量步行测试。在渐增负荷运动测试至自愿疲劳期间，采用开路肺量计测量VO₂max。利用75%受试者的性别、体重（千克）、身高（厘米）、次极量测试4分钟后的心率（HR）（4分钟HR）、心率差值（4分钟HR - 静息心率）以及次极量跑步机速度（英里每小时[mph]）等变量建立预测VO₂max的方程。使用其余25%的受试者进行验证。
共有113名受试者达到最大努力程度并纳入统计分析。开发组和验证组在各方面均相似。在验证过程中，均方误差为241.06，67%的受试者预测VO₂max在观察值的10%以内。
通过基于跑步机的次极量测试方案，可准确预测该超重儿童队列的VO₂max。
