weight loss

Okay this is gonna sound ridiculous but how do I lose weight without exercising?? In the last year I've crushed a vertebrae in my spine making it very difficult and painful for me to exercise. I've tried but it's just too painful and I can't do much. I've put on a lot of weight since it happened as I used to be very active- rock climbing every week- and now I do nothing 😞 it's really getting me down how can I lose weight?