Never had anything in 35+ years behind a computer, but most of that were behind a laptop and I always hang on a couch or stand/walk working and do weights daily

Never had anything in 35+ years behind a computer, but most of that were behind a laptop and I always hang on a couch or stand/walk working and do weights daily. Sitting, no matter how much they say it’s an ergonomic chair doesn’t and never did work for me; behind a computer or not. That is why we have couches and hardly any chairs (those are for the guests should they insist).