Originally Posted by Joe4d
talk to your PT, you are paying for their time, pick their brains.
I'm with Joe4d, tell your PT exactly what you need to be able to do and he/she should be able to help you with tailored exercises - for both knee strength and posture. It's what they do!!!
For the posture, you do have to think of it and correct yourself on a regular basis until it's habit. I've had do do this because of SI joint & shoulder troubles (minimize the arch in the backbone for the SI joint; keep shoulders back for the tendinitis/impingement) - whenever I think about it I pull my body to a more correct position. I won't say it's given me perfect posture, but I do think it's improved things.