One of the persistent ideas about “good” posture is that it has to be upright, often with right angles at the knees and elbows, feet parallel, etc. A book balanced on the head often springs to mind. Yet healthy posture can look surprisingly different from this.
Recline and Relax, Executive-style!
Over the years, I have often shown students with recliners that they can get a compression-relieving stretch in their lower back as the backrest slides away from the seat (assuming the mechanism is designed advantageously). This is something you might like to try out for yourself.