Changing Trunk Muscle Activation in Patients With Recurrent Low Back Pain in Remission

The first aim of the study is to investigate the effects of a single therapy session on trunk muscle activation and lumbopelvic sensorimotor control in persons with recurrent low back pain in remission. The second aim of the study is to examine the convergent validity of (in)voluntary multifidus activation by means of inspection and palpation during two clinically assessed lumbopelvic sensorimotor control tests in persons with recurrent low back pain in remission. The convergent validity will be examined by calculating the relationship between (1) the clinical score of (in)voluntary multifidus activation, (2) back muscle activation during the same tests measured simultaneously with electromyography and (3) trunk muscle activation during other functional movements measured with electromyography. The third aim of the study is to investigate the convergent validity of a left-right discrimination test by calculating the relationship between (1) the left-right discrimination test, (2) position-reposition test, (3) the Fremantle Back Awareness Questionnaire and (4) the Photograph Series of Daily Activities Scale.