In my opinion, standing vs sitting is irrelevant as long as you work out and have some muscles to support your spine and help maintaining good posture for long-

In my opinion, standing vs sitting is irrelevant as long as you work out and have some muscles to support your spine and help maintaining good posture for long-ish periods of time. I would guess fitness accounts for at least 70% of not having back problems, which makes me believe people with a strong back can sit/stand however the hell they want. Can anyone enlighten me with any research or articles that correlates with my beliefs?