Academic performance and psychosocial functioning in European schoolchildren: The role of cardiorespiratory fitness and weight status.

Background: Whether a high cardiorespiratory fitness (CRF) can attenuate the potential detrimental effect of childhood obesity on academic performance and particularly psychosocial functioning remains unclear.

Objectives: To analyse the academic performance/psychosocial functioning of schoolchildren attending to their CRF and weight status.

Methods: 470 schoolchildren (46% girls, 7 ± 0 years) from 20 schools in five European countries were categorized as (i) having overweight/obesity (n = 113) or normal weight (n = 357) attending to body mass index and (ii) 'fit' (n = 282) or 'unfit' (n = 188) based on 20-meter shuttle-run performance (CRF ≥ or <42 ml·kg ·min [boys] and 35 ml·kg ·min [girls], respectively). Academic performance and psychosocial functioning were assessed using the grades attained in school subjects and the Strengths and Difficulties Questionnaire (SDQ) for parents, respectively.

Results: Independent of their weight status, fit children showed a greater academic performance and psychosocial functioning than their peers who were unfit and overweight/obese. In fit children, academic performance and psychosocial functioning did not differ between the two weight status categories (normal weight or overweight/obesity).

Conclusions: Children with a higher CRF show a greater performance achievement and psychosocial functioning regardless of their weight status, thereby supporting the 'fat but fit' paradox and reinforcing the importance of improving CRF in this population.