For the most part, easy exercise, like walking, is okay and sometimes encouraged. Though, for the aforementioned elites used to a more rigorous routine, special care may be needed. Also, weight training during the first trimester should most likely be avoided as it can cause miscarriage.
Dr. Bruce Young, a professor of obstetrics and gynaecology at New York University School of Medicine had something to say about the sentiment.
It’s recommended that those used to extreme exercise cut back if/when trying to conceive, as it can affect ovulation.
One point the report isn’t clear on is whether or not exercise reduces the risk of tears or trauma during delivery — so, as with everything else, proceed with caution.
Dr. Vincenzo Berghella, Director os the Division os Maternal-Fetal Medicine at Thomas Jefferson University Hospital in Philadelphia, advises 30 to 90 minute sessions, three to five times a week for pregnant women, though that should be shortened in the later months of pregnancy because the heart is working a lot harder to keep up and for obvious reasons!
Your physician should be your greatest ally. Your doctor will tell you what your body can probably handle while pregnant — and if it seems like to much, don’t do it.
The report is featured in the British Journal of Sports Medicine.