My back problems have caused my left leg to become weak so when I would be doing something, I would always be mindful of that. I was cleaning out one of the ferret cages one night and hanging up new bedding for them. I had my right foot planted firmly and when I went to turn my body, forgot to release my step and turn my leg at the same time so I did a wrenching with my full body weight on that knee. I knew it immediately, there was intense pain, I heard a pop, my knee began to swell and within a day or two a large bruise appeared. I waited for one day short of two weeks, it was still hurting a lot even taking the Perocet breakthrough medicine and also with the Fentanyl pain patch so I went to my family doctor and he immediately ordered an MRI, he felt sure I had done something which I had so in answer to your question do the two go together not sure but in my case it was because of my back and weakened left leg that caused me to injure my right knee.
Does that make any sense??