Department of Physical Education, Federal University of Paraná , Curitiba, Brazil.
Department of Centro de Investigação em Actividade Fìsica, Saúde e Lazer (CIAFEL), University of Porto , Porto, Portugal.
J Sports Sci. 2020 Nov;38(22):2588-2596. doi: 10.1080/02640414.2020.1794255. Epub 2020 Jul 25.
This study aimed to develop new prediction models from directly determined peak of oxygen uptake (VO) in adolescents using 20-metre shuttle run test (20 m-SR) and to compare the new models with previously published equations. This study included 148 adolescents (43% girls), aged 13.37 ± 1.84 years old. Adolescents were randomly assigned to validation (n = 91) and cross-validation (n = 57) groups. VO was measured using a gas analyser in both maximal exercise tests in the laboratory as well as by 20 m-SR. The multiple linear regression method was applied to develop the models using BMI, BMI-z score and body fat percentage (%FM). The proposed models presented better predictive performance (R2 = 75.6% to 78.9%) and a lower absolute percentage error (%error = 10.51 to 11.78%) than the previously published equations (R2 = 38.8% to 69.1%; %error = 13.13% to 21.54%). The Model with BMI-z was the best fit equation in girls, and the model with BMI-z and %FM in boys. Therefore, it is recommended that the equations developed in the present study be used in future research and projects in the school environment to estimate VO in adolescents by the 20 m-SR test.
本研究旨在利用 20 米往返跑测试（20 m-SR）直接确定青少年的最大摄氧量峰值（VO），开发新的预测模型，并将新模型与之前发表的方程进行比较。本研究纳入了 148 名青少年（43%为女性），年龄为 13.37±1.84 岁。青少年被随机分配到验证（n=91）和交叉验证（n=57）组。在实验室中的最大运动测试和 20 m-SR 中均使用气体分析仪测量 VO。使用 BMI、BMI-z 评分和体脂百分比（%FM），采用多元线性回归方法开发模型。所提出的模型具有更好的预测性能（R2=75.6%至 78.9%）和更低的绝对百分比误差（%error=10.51%至 11.78%），优于之前发表的方程（R2=38.8%至 69.1%；%error=13.13%至 21.54%）。BMI-z 模型是女孩中最佳拟合方程，而 BMI-z 和%FM 模型是男孩中最佳拟合方程。因此，建议在未来的学校环境研究和项目中使用本研究中开发的方程，通过 20 m-SR 测试估计青少年的 VO。
