I started doing leg extensions roday after the all clear from my OS.
I gingerly put 5kg or so of weight... meh no drama.. added another 5 and so on...
I hit 50kg and the quads were starting to fatigue, but not even a tweak anywhere in the knee.
Despite what I have read about leg extension not being the most effecient of quad exercises, I can say that the burn I was feeling said otherwise!
So far so good - and I will now incorporate them, along with drop squats and other regulars in my leg program.
I also cracked more than 200lb single leg press today *happy* Im sure I never got close to that pre-op. Hehe its funny - I wonder if hte only people loading up the leg-press machine to full are knee geeks
We hurt our knees and presto - end up doing ridiculous weights in the name of rehab