Chiming in. Was having some back issues when I started a full-time "desk job".
Got a simple sit-stand dsek. Start the day standing at 8am, usually siting by about 11am. Lunch and a short walk. Sit or stand depending on how my legs are feeling after lunch. And then finish the last hour of the day standing. But it's really "try to stand unless focus/legs are asking for it".
That and a few short laps around the office every couple hours and my back pain is gone.
More seriously, having a note from your doctor might help. When I was having back pain I saw a physiatrist, who recommended a sit/stand desk and physical therapy (both effective), and I asked for a note for the desk which she happily supplied.
Got a simple sit-stand dsek. Start the day standing at 8am, usually siting by about 11am. Lunch and a short walk. Sit or stand depending on how my legs are feeling after lunch. And then finish the last hour of the day standing. But it's really "try to stand unless focus/legs are asking for it".
That and a few short laps around the office every couple hours and my back pain is gone.