Review of studies showed that the effectiveness of stabilization exercises in patients with nonspecific LBP is not yet fully established. In clinical trials that improvement reported after motor control exercise, other intervention accompanied with these exercises. Also, the results of motor control exercise studies are different. On the other hand, the evidence underpins the primary aim of motor control exercise, which is to re-establish normal control of the deep spinal muscles, reducing the activity of more superficial muscles that tend to stiffen the spine and have increased activity in low back pain, and then maintain normal control during progressively more demanding physical and functional tasks. For these reasons, we decided to identify the efficacy of motor control exercises, usually considered as specific trunk muscle stabilization exercises. A randomized controlled trial was only way for identifying the role of these exercises in treating chronic low back pain. Also, our choice coincides with the research agenda set by the 2004 European Guideline.