I’ve just started on the 12 week plan, so this week’s challenge is exercise. My problem is that I have worn out knees which really should be replaced if I wasn’t scared of the surgery. So Couch to 5 K is completely out. Things like squares are out on the exercise plans. I do try to do a daily walk, but these days I am limited how far I can walk. I used to go to the gym but Covid puts me off that. I do have an exercise bike. Are there other practical exercise options I can try so I can get my 150 minutes in?