I know from sprains the knees or ankles take a long time to heal. I hope you don't gain any extra weight, but you maybe already have for as long as you've been laid up.
Any time I put on an extra 10 pounds, I feel more pain in my joints, and off goes the feed bag again. When you are fairly inactive, it is so easy to add 10 pounds.
Right now, I added about 15 lbs....okay-okay 20... over the winter, but I hope that will go easy enough with my Spring yard & house cleaning.
Fortunately it's still snowing here, so I don't have to punish myself, just yet.