Can you BUILD muscle during pregnancy? A lot of women (and trainers) have asked me if this is a reasonable goal during pregnancy. As always, the answer starts with “it depends” - MOSTLY it will depend on whether you are already trained or not. So let’s first talk about women who are TRAINED - i.e. they already lift weight and have muscle mass. (Scroll down to the next section to learn about UNtrained pregnant women, if you want to start lifting weights during your pregnancy,