The following exercises will help you to build a stronger back when you have an injury that prevents you from doing heavy back work. These are lower intensity moves that can be added to your regular ab/core routine once or twice a week until you are ready for more advanced work.
Upper Back
Standing Resistance Band Row 2-3 sets for 10-15 reps
Lower Back
Supermans - Can be done alternating leg and arm, both arms and legs at same time, and same arm with same leg
Ball Hyperextensions
Choose a different one each workout and do 2-3 sets for 10-15 reps