Ask HN: Programming on a treadmill desk?

Hey fellow software developers. I have serious issues with my back and neck, and while I have been happily using a standing desk for few years now, I am thinking about getting myself a treadmill beneath it. The big question is - is it possible to write code while walking? Does it interfere with typing or thought process?

In relation to this question, my blog post that covers spine issues and how I deal with them: https://www.fitnessblip.com/how-standing-desk-can-change-your-life

P.S.: Blog post contains affiliate links to Amazon. Please don't judge. :)