Hi Kakky
In reply to your questions I was back on a stationary bike in 4 weeks doing short stints. It was more getting the knee to turn over rather than anything cardio. I routinely readjusted the sadle (up/down) so that the knee and leg muscles had to think about what they were doing rather than just turning over. Throughout the next month I went through this routine. In conjunction after the wound had fully healed I was back in the pool every second day if I could make it. I found the pool best off all and did a lot of straight leg raises, straignt leg backwards (dont know what thats called), side legs, small straight leg kicking on my back and front and then gentle leg bends. I also did squats in water up to my chest and then as my leg got stronger did them in more shallow water until it was up to my waist. If I thought there was too much pressure on my knee I backed off. Throughout the whole rehab I went for high reps, low pressure, low weights and did the exercises super slow. I felt I needed to be in control at all times. Every second day I rested my knee NO EXERCISE.
On the med side after 4 weeks I only took NSAIDs when needed and a couple of paracetemol.
Hope the rehabs going well the key in my mind, like with all sport, is slow and controlled with plenty of rest to let the body recover
Trust this helps
Regards
Patrick