Validation of equations to estimate the peak oxygen uptake in adolescents from 20 metres shuttle run test

ABSTRACT

This study aimed to develop new prediction models from directly determined peak of oxygen uptake (VO_2peak) 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_2peak 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_2peak in adolescents by the 20 m-SR test.

KEYWORDS:

• Cardiorespiratory fitness
• body fat
• body mass index
• youth
• exercise test

Disclosure statement

The authors declare no conflicts of interest.

Supplementary material

Supplemental data for this article can be accessed online https://doi.org/10.1080/02640414.2020.1794255

Additional information

Funding

This work was supported by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - Brasil (CAPES) – Finance Code 001, Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Fundação para a ciência e tecnologia [FCT: SFRH/BSAB/142983/2018 and UID/DTP/00617/2019], Programa Pesquisa Para o SUS (PPSUS – edital - CP 01/2016) via Fundação Araucária de Apoio ao Desenvolvimento Científico e Tecnológico do Estado do Paraná (Decit/MS) and Secretaria da Saúde do Estado do Paraná (SESA-PR).