RT Journal Article SR Electronic T1 Motor control exercise for symptomatic lumbar disc herniation: protocol for a systematic review and meta-analysis JF BMJ Open JO BMJ Open FD British Medical Journal Publishing Group SP e012426 DO 10.1136/bmjopen-2016-012426 VO 6 IS 9 A1 Pourahmadi, Mohammad Reza A1 Taghipour, Morteza A1 Ebrahimi Takamjani, Ismail A1 Sanjari, Mohammad Ali A1 Mohseni-Bandpei, Mohammad Ali A1 Keshtkar, Abbas Ali YR 2016 UL http://bmjopen.bmj.com/content/6/9/e012426.abstract AB Introduction Lumbar disc herniation (LDH) is a common condition in adults and can impose a heavy burden on both the individual and society. It is defined as displacement of disc components beyond the intervertebral disc space. Various conservative treatments have been recommended for the treatment of LDH and physical therapy plays a major role in the management of patients. Therapeutic exercise is effective for relieving pain and improving function in individuals with symptomatic LDH. The aim of this systematic review is to evaluate the effectiveness of motor control exercise (MCE) for symptomatic LDH.Methods and analysis We will include all clinical trial studies with a concurrent control group which evaluated the effect of MCEs in patients with symptomatic LDH. We will search PubMed, SCOPUS, PEDro, SPORTDiscus, CINAHL, CENTRAL and EMBASE with no restriction of language. Primary outcomes of this systematic review are pain intensity and functional disability and secondary outcomes are functional tests, muscle thickness, quality of life, return to work, muscle endurance and adverse events. Study selection and data extraction will be performed by two independent reviewers. The assessment of risk of bias will be implemented using the PEDro scale. Publication bias will be assessed by funnel plots, Begg's and Egger's tests. Heterogeneity will be evaluated using the I2 statistic and the χ2 test. In addition, subgroup analyses will be conducted for population and the secondary outcomes. All meta-analyses will be performed using Stata V.12 software.Ethics and dissemination No ethical concerns are predicted. The systematic review findings will be published in a peer-reviewed journal and will also be presented at national/international academic and clinical conferences.Trial registration number CRD42016038166.