Great job. I think a great indicator of strength increase and progress, is when what used to feel like "heavy" weights feels very light. IE 335 feeling like 135. That is always something that makes myself feel good.
Hope the lower back and knee strains heal up quick!
"The fastest way to get strong muscles is also the fastest way to make them bigger. We know what works best to make them strong in the shortest time possible. If you want to get big, do the thing that makes them strong." - Marc Rippetoe
Zdravko Veselin Gaeta
I am not a powerlifter nor am I a bodybuilder. I just want to be big and strong.