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Research Paper

Cardiorespiratory fitness, but not physical activity, is associated with academic achievement in children and adolescents

, , , , , & show all
Pages 309-315 | Received 05 Aug 2016, Accepted 20 Feb 2017, Published online: 03 Apr 2017
 

Abstract

Background: Cardiorespiratory fitness (CRF) and physical activity (PA) seem to have positive effects on academic achievement (AA), although in most studies, objective methods of assessment have not been used.

Aim: To examine the associations of CRF and PA with AA.

Subjects and methods: A sample of 640 youngsters (10–18 years) participated in this cross-sectional study. CRF was estimated with the 20-metre shuttle run test and PA was measured using accelerometers. School grades were used to describe AA using mathematics and native language final grades. The relationship between CRF and PA with AA was analysed using ANCOVA.

Results: Results show a significant effect of CRF levels on native language grades, after adjustment for confounders [F(3,414) = 3,99 p < 0.05], but not for mathematics [F(3,360) = 0.95 p > 0.05]. No significant effects of PA levels on AA were found.

Conclusions: CRF is associated with moderate-to-vigorous PA (MVPA) and higher levels of CRF may influence AA. CRF is positively correlated with MVPA, suggesting that higher amounts of MVPA might improve CRF and indirectly influence AA. Since CRF is dependent on higher intensities of PA, we can suggest a focus on implementing improvement strategies to increase the intensity of physical education lessons.

Acknowledgements

We thank to all the children and adolescents, their parents and physical education teachers that participated in our study.

Disclosure statement

The authors report no conflicts of interest. The authors alone are responsible for the content and writing of the paper.

Additional information

Funding

This work was supported by FCT- Portuguese Foundation for Science and Technology through first author individual grants MCTES – FCT: SFRH/BD/79886/2011, project grant FCOMP-01–0124-FEDER-028619 (PTDC/DTP-DES/1328/2012); and Research Centre supported by: FCT/UID/DTP/00617/2013.

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