Originally Posted by potter

Standing is just as bad for you. It's not that either are specifically "bad" for you. If you begin standing at work all day, you'll run into back problems, joint issues in the legs, ankle stress. It doesn't matter what you do.

Our bodies weren't designed for either. Evolution millions of years ago wasn't thinking "I think I'll plan on this species becoming a work force and being in an office for eight hours of their day". That's not how it works.