What kind of exercise will strengthen the knees without stressing them?
I had surgery to my right knee for chronic dislocation more than 30 years ago. Lately it’s been wobbling under me at unexpected moments, as if it’s getting ready to go out. I know the feeling, and it’s a nasty one.
From time to time the left one (never operated) does go out, and I end up wearing a knee brace for months before somehow it’s ok again.
I have a feeling that if it goes out now, it’ll be bad. I’d like to prevent it.
What kind of exercise could I do that would result in strengthening both knees without putting me at risk in the process?
This question is in the General Section. Responses must be helpful and on-topic.