Sophie Guidolin pregnant

We know the importance of staying physically fit during pregnancy, for our own health as well as baby's. But knowing just how much to do (or indeed, just feeling up for it) can feel like a puzzle.

That's probably why the Internet goes crazy when pregnant mamas with significant social media followings post photos of themselves weightlifting.

Australian fitness influencer Michelle Bridges, who has nearly 100,000 followers on Instagram, posted a video of herself lifting weights this week, and then deleted it following an onslaught of negative feedback.

Trainer and nutritionist Sophie Guidolin, pictured here (who has more than 200,000 Instagram followers of her own) became the target for similar attacks more than a month ago after she posted a photo of herself lifting a 30-kilogram weight while she was 26 weeks into her twin pregnancy. And she's been quick to come to Bridges' defense, telling the Daily Mail Australia, "'Wouldn't it be nice If we could celebrate the fact that a respected woman is dispelling some of the myths around remaining active during pregnancy?"

Another professional fitness mom and pregnant weightlifter, Amy Updike, recently told Fit Pregnancy, "I have had mostly positive comments from my amazing followers. But, I have of course had negative comments [from] people who are mostly uneducated about pregnancy... The outdated thought that pregnant women should just be very careful and not very active during pregnancy has been passed down from past generations and [has] pervaded the thoughts of people, even of my current generation! Educating others has become a passion of mine—that exercise can and should be a part of pregnancy when the pregnancy is low risk and the woman is healthy."

The reality is, exercise in pregnancy is generally safe and desirable—up to any specific limits recommended by your own doctors. (Make sure to ask, and check in regularly!)

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Alesandra Dubin is a mom to one-year-old boy-girl twins. She's also a Los Angeles-based writer and the founder of lifestyle blog Homebody in Motion. Follow her on Facebook, Instagram, Google+ and Twitter.