I am 10 weeks post op. What I do is add a little more to my workout and see how I feel the next day. One thing I am very careful of is to have the correct form. If I start pushing hard and feeling my form falling apart…I back off. For instance, I was pushing hard on a segment the other day while riding my triathlon bike and noticed my knee was a hitting the center bar and not tracking up and down correctly so I backed off. As others have said, let your body be the guide.