Is surface EMG biofeedback an effective training method for persons with neck and shoulder complaints after whiplash-associated disorders concerning activities of daily living and pain -- a randomized controlled trial.

Objective: To evaluate the effectiveness of surface electromyographic (EMG) biofeedback training as a supplement to an interdisciplinary rehabilitation programme regarding consequences for activities of daily living and pain.

Design: A randomized controlled unblinded trial.

Settings: The study was carried out in a pain unit at a rehabilitation centre.

Subjects: Sixty-five people with chronic whiplash-associated disorders consecutively referred to the pain unit agreed to participate in the study. Participants were randomly assigned to either the treatment or control group.

Intervention: All participants received interdisciplinary rehabilitation and the treatment group also had four weeks of surface EMG biofeedback training.

Main Measures: The Canadian Occupational Performance Measure was used at admission discharge and at six-month follow-up to register changes in activities of daily living. The Multidimensional Pain Inventory, Swedish version, was used at admission and at six-month follow-up to capture the multidimensional aspects of pain.

Results: Sixty-two people completed the study. Both treatment and control groups improved significantly according to the Canadian Occupational Performance Measure at discharge and the results remained after six months (P<0.001). The subscale 'Interference' on the Multidimensional Pain Inventory was significantly decreased at six months for the treatment group (P<0.001). No differences were found between the two groups for activities of daily living (performance P = 0.586; satisfaction P = 0.988) at follow-up or for pain level (P = 0.914), indicating no additional effect of the surface EMG biofeedback training.

Conclusion: In this study there was no support for the effectiveness of surface EMG biofeedback training as a supplement to an interdisciplinary rehabilitation programme for people with long-lasting pain after whiplash.