Prediction equation of peak oxygen uptake for the modified shuttle test in healthy adolescents

ABSTRACT Given the gap in the literature regarding the peak of oxygen consumption (VO2peak) for adolescents of both sexes, this study aimed to propose an equation to predict the VO2peak in healthy adolescents using the Modified Shuttle Test (MST). This is a cross-sectional study with 84 healthy adolescents between 12 and 18 years old, female and male. The MST is an external paced test, in which the speed increases at each minute. Two MST were performed with at least 30 minutes of rest between them. The test with the longest walked distance was considered for analysis. VO2 was directly monitored by an open circuit spirometry. Mean age was 14.67±1.82 and the walked distance was 864.86±263.48m. Variables included in the prediction equation were walked distance and sex, explaining the VO2peak variability of 53% during MST performance. The prediction equation for VO2peak with the MST was: predicted VO2peak=18.274+(0.18×Distance Walked, meters)+(7.733×Sex); R2=0.53 and p<0.0001 (sex: 0 for girls, 1 for boys). This MST equation, proposed to predict VO2peak in healthy adolescents of both sexes, can be used as a reference to assess exercise capacity in healthy adolescents and to investigate cardiopulmonary function in adolescents with reduced functional capacity.

摘要 鉴于现有文献针对两性青少年峰值摄氧量（VO2peak）的研究存在缺口，本研究旨在借助改良往返跑试验（Modified Shuttle Test, MST）提出一种用于预测健康青少年峰值摄氧量的方程。本研究为横断面研究，纳入84名年龄介于12至18岁的健康男女青少年。改良往返跑试验为外部节奏控制的耐力测试，每一分钟提升一次行进速度。受试者需完成两次试验，两次试验间隔至少30分钟休息时间，取行进距离更长的一次结果用于分析。采用开放式肺量计直接监测摄氧量（VO2）。受试者平均年龄为14.67±1.82岁，平均行进距离为864.86±263.48米。本预测方程纳入的变量为行进距离与性别，可解释改良往返跑试验中53%的峰值摄氧量变异度。针对改良往返跑试验的峰值摄氧量预测方程为：预测峰值摄氧量=18.274+(0.18×行进距离，米)+(7.733×性别)；决定系数R²=0.53，p<0.0001（性别赋值：女生为0，男生为1）。本研究提出的改良往返跑试验峰值摄氧量预测方程可用于评估健康青少年的运动能力，亦可作为探究功能能力受损青少年心肺功能的参考工具。