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No association between maternal exercise during pregnancy and the child’s weight status at age 7 years: The MoBa study

Andreassen, Silje Malen; Ekelund, Ulf; Bernhardsen, Guro Pauck
Peer reviewed, Journal article
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URI
https://hdl.handle.net/11250/3008807
Date
2021
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Original version
Scandinavian Journal of Medicine & Science in Sports. 2021, 31 (10), 1991-2001.   10.1111/sms.14015
Abstract
Introduction: Maternal lifestyle during pregnancy may affect the development of overweight and obesity in the child. We examined whether maternal exercise during pregnancy is associated with offspring overweight and obesity in childhood. A secondary aim was to examine whether the association is affected by the child's physical activity level. Materials and methods: This study is based on data from the Norwegian Mother, Father and Child Cohort Study (MoBa), including 44 352 pregnancies and children (n = 32 304 in week 17 and n = 32 419 in week 30 in the final adjusted model). Maternal exercise during pregnancy was self-reported in gestational weeks 17 and 30. We conducted linear and logistic regression separately for girls and boys, and outcomes were the child's body mass index (BMI) and weight status (overweight/obese) at age 7 years. We further examined the additive joint association between maternal exercise during pregnancy and the child's leisure time physical activity on weight status at age 7 years. Results: In total, 12.4% of the children were classified as overweight or obese, and 1.7% as obese. The results suggest no association between maternal exercise in both gestational weeks 17 and 30 and the weight status of the child at age 7 years. The association between maternal exercise and the child's weight status at age 7 years appears not to be affected by the child's physical activity level. Conclusion: Maternal exercise level during pregnancy does not appear to be associated with the child's BMI or odds of being overweight or obese in childhood.
Journal
Scandinavian Journal of Medicine & Science in Sports

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