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Association between Physical Activity in Obese Pregnant Women and Pregnancy Outcomes: The UPBEAT Pilot Study

Lookup NU author(s): Dr Louise HayesORCiD, Dr Ruth Bell, Professor Steve RobsonORCiD


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Background: Obesity in pregnancy is associated with fetal macrosomia, a raised neonatal fat mass and an increased risk of obesity and poor metabolic health in childhood which persists into adulthood. The offspring of obese women are more likely to be obese than the offspring of lean women when they become pregnant themselves, perpetuating a cycle of obesity and its associated negative metabolic consequences. Increasing physical activity during pregnancy could improve insulin sensitivity and reduce the risk of maternal and offspring adverse outcomes. The UK Pregnancy Better Eating and Activity Trial (UPBEAT) is a trial of a complex intervention designed to improve pregnancy outcomes through dietary changes and physical activity. Data from the pilot trial of 183 women were available for analysis. The relationship between the time spent at different physical activity levels and maternal and infant pregnancy outcomes was examined. Key Messages: Strong evidence exists that physical activity improves insulin sensitivity in non-pregnant populations, and lifestyle interventions of proven effectiveness in non-pregnant populations have been developed. Women who are active in pregnancy demonstrate better glucose control and favourable pregnancy outcomes. There is a lack of effective interventions to support obese pregnant women to be physically active. Conclusions: No difference was detected in objectively measured physical activity between women randomised to the intervention and control arms of the UPBEAT pilot trial. Light-intensity physical activity was lower in early pregnancy in women who delivered macrosomic infants. Maternal sedentary time at 35-36 weeks' gestation was positively associated and moderate-intensity physical activity was inversely associated with neonatal abdominal circumference. Maternal physical activity is associated with infant birth weight and abdominal circumference and is an appropriate target for intervention to improve infant outcomes. The challenge remains to develop an effective intervention to support obese pregnant women to be physically active. (C) 2014 S. Karger AG, Basel

Publication metadata

Author(s): Hayes L, Bell R, Robson S, Poston L, on behalf of the UPBEAT Consortium

Publication type: Article

Publication status: Published

Journal: Annals of Nutrition and Metabolism

Year: 2014

Volume: 64

Issue: 3-4

Pages: 239-246

Print publication date: 01/10/2014

ISSN (print): 0250-6807

ISSN (electronic): 1421-9697

Publisher: Karger


DOI: 10.1159/000365027


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Funder referenceFunder name
RP-0407-10452National Institute for Health Research (NIHR) under Programme Grants for Applied Research programme