| Back ExercisesReferral for reactivation/rehabilitation should be
            considered for patients who have not returned to ordinary activities
            and work by 6 weeks. | 
               
                |     | On the evidence
                  available at present, it is doubtful that specific back
                  exercises produce clinically significant improvement in acute
                  low back pain, or that it is possible to select which patients
                  will respond to which exercises. |   
                |    | There is some
                  evidence that exercise programmes and physical reconditioning
                  can improve pain and functional levels in patients with
                  chronic low back pain. |   
                |   | There are
                  theoretical arguments for commencing exercise programmes and
                  physical reconditioning at around 6 weeks. |  |