Potential effects of maternal physical activity on birth weight: brief review

Medicine and Science in Sports and Exercise
J M Pivarnik

Abstract

This review lists the most commonly accepted risk factors for low birth weight (LBW) and offers critical examination of research on the effect of maternal physical activity, both occupational and leisure time, on birth weight. Some studies have shown job related physical "activity" to be related to unfavorable birth outcomes, including premature delivery and LBW. However, most studies have not controlled for socioeconomic status, nor has actual physical activity been well quantified throughout gestation. Similarly, results of the relationship between leisure time physical activity and birth weight are mixed. Current evidence appears to indicate participation in moderate to vigorous activity throughout pregnancy may enhance birth weight, while more severe regimens may result in lighter offspring. Careful quantification of caloric balance during pregnancy in chronic exercisers is needed before further conclusions can be drawn. Indeed, the interaction between energy expenditure (whether job related or leisure time) and caloric consumption must be addressed to determine whether physical activity per se may affect birth outcome, or if it is merely a confounder. Future studies should include randomized trials in which women without a...Continue Reading

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Citations

Jun 17, 2003·Clinical Obstetrics and Gynecology·James M PivarnikTodd Moyerbrailean
Apr 11, 2007·Revista de saúde pública·Marlos Rodrigues Domingues, Aluísio J D Barros
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Nov 18, 2006·Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquée, Nutrition Et Métabolisme·Isabelle GirouxMichelle F Mottola
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