Correct posture on road bike????

[hilldweller]

Hi there, I'm confused . Can anyone point me towards pics or diagrams showing good posture on a road bike? Or the things you have to remind yourself of to maintain correct posture while riding? I'm trying to reconcile how I think I look on a bike with what I think the physio is saying (similar to good posture on an office chair, but tilted forward), and also how other cyclists look to my uneducated eyes (more like beetles with rounded backs LOL).

Thanks heaps .