Physical Exercise During Pregnancy and the Risk of Prete...
Danish 国立生育研究中心 从1996年 到 2002年六年间共收集了 87,232 例单胎妊娠孕妇的资料，研究发现，和很少进行锻炼的孕妇相比，在妊娠期间积极从事体育锻炼的孕妇的早产率大约能够降低40%，而且这种运动的好处不在于具体进行了何种方式，何种形式的锻炼。简而言之，“运动好于不运动，具体形式不重要”。
According to many national recommendations, women should be physically active during pregnancy, but empirical evidence to support this recommendation is sparse. The authors' aim in this study was to examine the relation between physical exercise during pregnancy and the risk of preterm birth. Self-reported data on physical exercise during pregnancy were collected prospectively for 87,232 singleton pregnancies included in the Danish National Birth Cohort between 1996 and 2002. Hazard ratios for preterm birth according to hours of exercise per week, type of exercise,and metabolic equivalent-hours per week, respectively, were calculated using Cox regression analysis. Results showed a reduced risk of preterm birth among the almost 40% of women who engaged in some kind of exercise during pregnancy in comparison with nonexercisers (hazard ratio=0.82, 95% confidence interval: 0.76, 0.88), but no dose-response relation was seen. The association was not affected by the type of exercise, and the results were not altered when the degree of preterm birth was taken into account. These findings do not indicate any adverse effects of exercise on the risk of preterm birth and therefore do not contradict current recommendations.