4.5 Article

Associations of physical condition with lung function and asthma in adolescents from the general population

Journal

PEDIATRIC ALLERGY AND IMMUNOLOGY
Volume 33, Issue 6, Pages -

Publisher

WILEY
DOI: 10.1111/pai.13811

Keywords

adolescent; asthma; epidemiology; physical fitness; respiratory function test; sedentary behavior

Funding

  1. Erasmus Medical Centre, Rotterdam
  2. Erasmus University, Rotterdam
  3. Netherlands Organization for Health Research and Development
  4. Netherlands Organization for Health Research and Development (ZonMw-VIDI)
  5. European Union [733206, 824989, 874583]

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Adolescents with lower physical fitness have poorer lung function and higher risk of asthma, while those with longer screen time have lower lung capacity.
Background: The relation of physical condition with respiratory outcomes in adolescents is unclear. We examined the hypothesis that adolescents with a lower physical condition represented by a lower cardiorespiratory fitness and physical activity, and a higher screen time have a lower lung function and higher risk of asthma. Methods: In a population-based prospective cohort study on 4854 children aged 13 years, we assessed cardiorespiratory fitness by using the peak work rate measured by the steep ramp test. Information on physical activity and screen time was obtained by self-reported questionnaires. Lung function was measured by spirometry and current asthma was assessed by a parental-reported questionnaire. Results: Taking sociodemographic, lifestyle, and growth-related confounders and multiple hypothesis testing into account, a 1 SD lower cardiorespiratory fitness was associated with a lower FEV1, FVC, and FEF75 (Z-score difference (95% CI): -0.31 (-0.35, -0.28), -0.30 (-0.33, -0.26), -0.13 (-0.17, -0.10), respectively), and a higher risk of asthma (Odds Ratio (95% CI) 1.25 (1.06, 1.46)). A 1 SD higher screen time was associated with a lower FVC (Z-score difference (95% CI): -0.06 (-0.10, -0.03)). Physical activity and screen time were not related to asthma. Results did not materially change after additional adjustment for respiratory outcomes at an earlier age. Conclusion: Adolescents with a lower cardiorespiratory fitness had a lower lung function and a higher risk of asthma. Those with a higher screen time had a lower FVC. Further studies are needed to explore the effect of improvements in physical condition on long-term respiratory outcomes.

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