Original ArticleReference Equation for the Incremental Shuttle Walk Test in Children and Adolescents
Section snippets
Methods
This was a cross-sectional study that included 108 healthy subjects. They were recruited from among students at private and public schools in São Paulo, Brazil. The protocol was approved by the Research Ethics Committee of the University (483692). The protocol began in April 2013 and ended in May 2014. All measurements were obtained in the school or in the physiology laboratory of our university (Nove de Julho University) by trained investigators.
The inclusion criteria were as follows: both
Results
A total of 173 subjects were selected, but 46 of the volunteers had chronic lung disease, 12 had abnormal lung function, and the parents of 7 volunteers did not sign the consent form. The final sample was 108 subjects; 52 (48%) of whom were male. The subjects' characteristics are described in Table I.
As expected, boys walked longer distances during the ISWT compared with girls (1064.4 ± 254.1 vs 889.7 ± 159.6, respectively, P < .0001; Table I). We divided the volunteers into children (≤12 years
Discussion
The present study describes an equation that can be used to predict the distance walked on the ISWT for children and adolescents. Age, sex, and BMI explained 48% of the variance in distance walked. Additionally, boys and the oldest volunteers walked a greater distance than girls and the youngest volunteers, respectively. We also determined that the ISWT is highly reproducible in children and adolescents.
Anthropometric variables have been included in the reference equations for field tests. Age,
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2021, Journal of Cystic FibrosisCitation Excerpt :In addition, HR and SpO2 were monitored throughout the test. The distance achieved in the test was calculated by counting the total number of shuttles and expressed in meters and percent of predicted [20]. The VO2 peak was estimated using the formula VO2 (mL·kg−1·min−1) = 20.301 + 0.019 x MST distance (meters) [14].
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Supported by São Paulo Research Foundation (2011/23221-7, 2013/11394-0 [to E.d.P.], and 2013/26187-0 [to L.N.]. The authors declare no conflicts of interest.