An investigation into the within-subject and between-subject consistency of motor patterns used during prone hip extension in subjects without low back pain

The results of this study indicate that the within-subject consistency in the motor patterns used to achieve prone hip extension in subjects without LBP is poor. The results seem to refute the “normal” activation order which has been proposed for this movement. As well, the GM was the final muscle to become active 81.3% of the time, which challenges the prevailing theory that a delayed onset of this muscle during the movement is associated with LBP. Despite this, research using LBP subjects must be performed before any comment can be made on whether “normal” or “abnormal” motor patterns exist for this movement.