“With bad knees, what exercises can I do for leg development?” – Tony Friend
I can definitely empathize. I have also had knee issues from years of wrestling in high school and college, and bad technique in the gym early on. But, even with knee pain, you can still train hard and make progress.
The goal with your program is to find the best leg exercises for your individual limitations and those that don’t cause any pain. Once you’re able to get these nailed down, then you’ll be able to enjoy training again and not be forced to do exercises you shouldn’t being doing.