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DOI:
https://doi.org/10.57187/4823

Original article

Vol. 156 No. 10 (2026)

Physical activity and screen time in children and adolescents born very preterm: a cross-sectional study

Cite this as:
Swiss Med Wkly. 2026;156:4823
Published
30.10.2026

Summary

OBJECTIVE: We aimed to assess physical activity and screen time in a cohort of very preterm-born children and adolescents (aged 5–16 years), in comparison with their full-term siblings. We also aimed to identify potential correlates of these lifestyle factors among the very preterm-born.

DESIGN: Cross-sectional survey in the greater Zurich area of Switzerland.

PATIENTS: Children born <32 weeks gestation (n = 482) as well as their full-term siblings (n = 149).

MAIN OUTCOME MEASURES: Physical activity (hours per day or meeting recommendations with >1 hour per day) and screen time (hours per day or <2 hours per day).

METHODS: Linear/logistic regression accounted for age group, sex and family unit. A classification tree analysis explored potential correlates of physical activity and screen time among the very preterm-born.

RESULTS: Physical activity of very preterm-born children was similar to that of their full-term siblings, but only one-third of participants met physical activity requirements (i.e. at least 1 hour per day). Screen time was similar in both groups, but much higher among adolescents regardless of preterm birth status. Chronic conditions and respiratory symptoms were not associated with insufficient physical activity. No correlates were identified for physical activity, while age group and socioeconomic status were associated with screen time.

CONCLUSIONS: No differences in physical activity and screen time were observed between very preterm-born children and their full-term siblings, but only one-third of participants met physical activity recommendations. Both groups were observed to be less active than the general population. Neither respiratory symptoms nor chronic conditions explained variation in these lifestyle outcomes. Both very preterm-born children and adolescents and their full-term siblings could benefit from better adherence to international physical activity and screen time guidelines.

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