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”。北京协和医院妇科张羽

      可见，积极的体育锻炼还是应该提倡的，但是国人因为身体素质不一，每个人的具体情况不一样，所以还要量力而行，根据自己的体质，体力，身体条件以及兴趣爱好进行选择。而且，一旦出现病理情况，例如先兆早产，胎膜早破，或者其他妊娠合并症时，还是要根据医生的嘱托，尽量休息，甚至有些情况下，例如破水了，是要绝对卧床的。

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.