We’ve been hearing for a while now that sitting is the new smoking— even for exercisers. And as standing desks are becoming more accessible and commonplace, we’re learning that standing all day has its problems too. But according to biomechanics expert Katy Bowman, whose new book Move Your DNA recently hit shelves, it’s not about sweating through a workout or whether you stand or sit in front of your computer. It’s about moving more like our ancestors did throughout the day, and Bowman isn’t afraid to take away creature comforts in the name of health. We’re not just talking about your desk chair anymore, but also your couch, your stroller, and even your mattress.