So, I went to an orthopaedic because I was experiencing lower back pain for several months and got an X-Ray done. The report says that my L5 is sacralised, L4 has spondylolisthesis, and a mild forward subluxation of L4 was noted in the neutral position. The doctor recommended me some medicines, physiotherapy, exercise, and diet for weight reduction as soon as possible. I asked him if anaerobic exercises can be done where the lower back may experience some sort of stress, like upper/lower back exercises, squats of various kind, and different combination of upper-mid-lower core-based exercises. He said he has almost no knowledge about resistance training, and so he can't emphasise upon that. He further added that I should stick to only cardio-based exercises and diet.
But my problem is that a 20-minute jog on the treadmill (for example) burns an average of 200-250 calories, and that can be gained by eating a doughnut, for instance. Sure, I can and will avoid all processed junk food but nonetheless, even if someone burns through an hour of cardio 800-900 calories, that can be easily replenished by eating complex carbohydrates or other macros. IMO, resistance training in combination with cardio would have been the best bet, but in my case, I'm not sure if I should even continue with resistance training. Or, if I do, which exercises (anaerobic) should I totally avoid till my lower back heals completely? Any advice would be really appreciated. Sorry if this question has been asked before, here.