I'm sorry about the diagnosis, Catrin, but I hope you and your medical team are able to make the best of it. Absolutely yes to that ice cream -- something decadent.

Does the gym where you do the kettle bells have recumbent stationary bikes? I know stationary bikes are not the most exciting things, but if your knee can handle it, it might be another cardio activity that you can do, especially in winter or on rainy days. Years ago I used to ride a stationary recumbent for an hour at a time, doing crossword puzzles to keep myself entertained. Maybe you could knit?