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Exercise during pregnancy has not been well documented as safe or beneficial. In this case-control study, investigators evaluated the effect of recreational physical activity on the development of preeclampsia. Cases were 201 women with preeclampsia who gave birth between April 1998 and June 2001 at 2 medical centers in Washington State. Controls were 383 normotensive women who gave birth on the same day as the cases and were matched for age and parity but had no history of hypertension or proteinuria during the study pregnancy.
During their postpartum hospital stays, the women were given structured questionnaires that collected sociodemographic, medical, reproductive, and lifestyle information. The women reported on physical activity perfor…