Danish 國立生育研究中心 從1996年 到 2002年六年間共收集了 87,232 例單胎妊娠孕婦的資料，研究發現，和很少進行鍛煉的孕婦相比，在妊娠期間積極從事體育鍛煉的孕婦的早產率大約能夠降低40%，而且這種運動的好處不在于具體進行了何種方式，何種形式的鍛煉。簡而言之，“運動好于不運動，具體形式不重要”。北京協和醫院婦科張羽

      可見，積極的體育鍛煉還是應該提倡的，但是國人因為身體素質不一，每個人的具體情況不一樣，所以還要量力而行，根據自己的體質，體力，身體條件以及興趣愛好進行選擇。而且，一旦出現病理情況，例如先兆早產，胎膜早破，或者其他妊娠合并癥時，還是要根據醫生的囑托，盡量休息，甚至有些情況下，例如破水了，是要絕對臥床的。

Mette Juhl; Per Kragh Andersen; Jørn Olsen; Mia Madsen; Tina Jørgensen; Ellen Aagaard Nøhr; Anne-Marie Nybo Andersen

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.