My wife has a slip disk she had injections and

Patient: My wife has a slip disk she had injections and the dr told her to walk and do sone stretches to make it better. She also fell down and hurt her knee nothing broken or torn and she goes to physical therapy and they also want her to walk. So i guess my question is will walking help her like they say. Because right now all she does is walk to bathroom and sleep all day.

Doctor: