Importance of Return to Usual and School Activities After Social Isolation in Recovering Vitamin D Concentrations, Physical Fitness, and Motor Performance in Adolescents

Frederico Bento de Moraes (), Maiara Cristina Tadiotto, Brenda Lenardt, Jorge Mota, Oslei de Matos and Neiva Leite
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Frederico Bento de Moraes: Department of Physical Education, Federal University of Paraná, Curitiba 81531-980, PR, Brazil
Maiara Cristina Tadiotto: Department of Physical Education, Federal University of Paraná, Curitiba 81531-980, PR, Brazil
Brenda Lenardt: Densitometry Research Laboratory, Postgraduate Program in Physical Education and Health, Technological Federal University of Paraná, Curitiba 81531-980, PR, Brazil
Jorge Mota: Center for Research in Physical Activity, Health and Leisure (CIAFEL)—Faculty of Sports, University of Porto (FADEUP), 4200-450 Porto, Portugal
Oslei de Matos: Densitometry Research Laboratory, Postgraduate Program in Physical Education and Health, Technological Federal University of Paraná, Curitiba 81531-980, PR, Brazil
Neiva Leite: Department of Physical Education, Federal University of Paraná, Curitiba 81531-980, PR, Brazil

IJERPH, 2024, vol. 21, issue 11, 1-10

Abstract: This study aimed to observe adolescents’ changes and individual responses regarding the anthropometry, cardiometabolic profile, vitamin D concentrations, physical fitness, and motor competence upon immediate return and three months of school activities after lockdown. Methods: The study included 28 adolescents (14.8 ± 0.8 years) of both sexes. Anthropometric measures, body composition, cardiometabolic parameters, physical fitness, and motor competence were assessed. A paired t -test was used to compare the frequencies of respondents and the effect size of the results, considering significant p < 0.05. Results: After three months of school activities, adolescents changed their body composition, reducing % fat mass ( p = 0.008) and increasing fat-free mass ( p = 0.008). In terms of physical fitness, there was increased abdominal resistance ( p < 0.001; ES = −0.42) and motor performance, with reduction in supine-to-stand test time ( p < 0.001; ES = 0.53). There were very beneficial effects in reducing resting heart rate ( p ≤ 0.001; ES = 0.61) and increasing vitamin D concentrations ( p < 0.001; ES = −0.61). After three months of a school routine, the proportions of change in respondents were similar between girls and boys and eutrophic individuals and overweight individuals. Conclusions: Returning to school activities after lockdown was important for the recovery of vitamin D concentrations, physical fitness, and motor competence, whose responses were independent of the level of adiposity and sex of the adolescents.

Keywords: youths; motor competence; COVID-19; physical conditioning (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2024
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