ArticleBMJ open sport & exercise medicine2017
Physical activity during pregnancy and infant's birth weight: results from the 3D Birth Cohort.
Article in BMJ open sport & exercise medicine, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT03113331 (3D Cohort Study), which is not on this map. Cited by 24 papers, 3 of them syntheses that pooled it.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
3D Cohort Study: The Integrated Research Network in Perinatology of Quebec and Eastern Ontario
Who cites it
24 citing papers in PubMed, 3 syntheses or guidelines pooled it, 36 citations in OpenAlex.
- The effects of different types of prenatal exercise on neonatal outcomes: a systematic review and network meta-analysis.Frontiers in physiology · 2026Pooled it
- Physical Activity during Pregnancy and Newborn Body Composition: A Systematic Review.International journal of environmental research and public health · 2022Pooled it
- The effects of vigorous intensity exercise in the third trimester of pregnancy: a systematic review and meta-analysis.BMC pregnancy and childbirth · 2019Pooled it
- Physical activity during the last trimester of pregnancy and its correlates among pregnant women: a cross-sectional analysis from the French national cohort ELFE.BMC pregnancy and childbirth · 2026Article
- The physical activity and sedentary behavior among pregnant women in Macao: A cross-sectional study.PloS one · 2025Article
- Determinants of macrosomia among newborns delivered in Jigjiga City, Eastern Ethiopia: a case-control study.Maternal health, neonatology and perinatology · 2024Article
- Incidence and determinants of low birth weight in Peninsular Malaysia: A multicentre prospective cohort study.PloS one · 2024Article
- Determinants of macrosomia among newborns delivered in northwest Ethiopia: a case-control study.The Journal of international medical research · 2022Article
- Beneficial Effects of Maternal Physical Activity during Pregnancy on Fetal, Newborn, and Child Health: Guidelines for Interventions during the Perinatal Period from the French National College of Midwives.Journal of midwifery & women's health · 2022Article
- Impact of Physical Activity of Pregnant Women on Obstetric Outcomes.International journal of environmental research and public health · 2022Article
- Influence of gestational weight gain on baby's birth weight in Addis Ababa, Central Ethiopia: a follow-up study.BMJ open · 2022Article
- Determinants of fetal macrosomia among live births in southern Ethiopia: a matched case-control study.BMC pregnancy and childbirth · 2022Article
- Physical inactivity in early pregnancy and the determinants in an urban city setting of Kuala Lumpur, Malaysia.BMC public health · 2022Article
- Movement Behavior during Pregnancy and Adverse Maternal-Fetal Outcomes in Women with Gestational Diabetes: A Pilot Case-Control Study.International journal of environmental research and public health · 2021Article
- Physical activity and exercise during pregnancy in Africa: a review of the literature.BMC pregnancy and childbirth · 2020Review
- High physical activity and high sedentary behavior increased the risk of gestational diabetes mellitus among women with excessive gestational weight gain: a prospective study.BMC pregnancy and childbirth · 2020Observational
- Developing a Physical Activity Intervention Strategy for Pregnant Women in Buffalo City Municipality, South Africa: A Study Protocol.International journal of environmental research and public health · 2020Article
- Article
- Associations between Prenatal Physical Activity and Neonatal and Obstetric Outcomes-A Secondary Analysis of the Cluster-Randomized GeliS Trial.Journal of clinical medicine · 2019Article
- Effects of Physical Activity During Pregnancy on Neonatal Birth Weight.Scientific reports · 2019Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
7 authors at 5 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
aimTo evaluate the association between maternal physical activity and infant's birth weight or risk of inappropriate weight for gestational age (GA), and whether this association differs by infant's sex, maternal body mass index (BMI) or pregnancy complications in a prospective cohort study.
methods1913 pregnant women from the 3D Birth Cohort (Québec, Canada) completed the Pregnancy Physical Activity Questionnaire at each trimester. Energy expenditure (metabolic equivalent of task (MET)*hours/week) for total activity, sports and exercise and vigorous intensity activities was calculated. The associations with birth weight and risk of inappropriate weight for GA were evaluated by regression modelling. Interactions were tested with infant's sex, maternal prepregnancy BMI, gestational diabetes, hypertensive disorders and prematurity.
resultsEach 1 MET/hours/week increase in sports and exercise in the first trimester was associated with a 2.5 g reduction in infant's birth weight (95% CI -4.8 to -0.3) but was not associated with the risk of small weight for GA. In contrast, although not significant, a 17% reduction in the risk of large weight for GA was observed with increasing sports and exercise. Furthermore, in women with subsequent pre-eclampsia (but not normotensive or hypertensive women), each 1 MET/hours/week increment spent in any vigorous exercise in the first trimester reduced the infant's birth weight by 19.8 g (95% CI -35.2 to -4.3).
conclusionsPregnant women with higher sports and exercise levels in the first trimester delivered infants with a lower birth weight. The risk of reducing infant's birth weight with vigorous exercise in women who develop pre-eclampsia later in pregnancy requires evaluation.
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