IRCT20150602022539N8 IRCT 2018-05-27 Vice chancellor for research, Semnan University of Medical Sciences The effect of mindfulness based cognitive therapy in addition to stability exercise in low back pain The effect of mindfulness based cognitive therapy in addition to stability exercise on disability, fear avoidance beliefs and the thickness of multifidus muscle in the subjects with non specific low back pain 2018-05-19 anticipated 40 Complete https://irct.ir/trial/19423 interventional Randomization: Randomized, Blinding: Not blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment, Randomization description: Randomization method: Permuted block randomization Randomization unit: Person Stratified randomization: Not done Randomization instrument: ٌRandom allocation software (Excel) Random sequence generation: Used random blocks, each block containing 4 people and allocated a number from 1 to 6 to each block Allocation concealment: Because of physiotherapy interventions for patients, allocation concealment is not possible. 2-3 Low back pain. Intervention 1: In the control group stability exercise will be applied in 3 sessions per week during 8 weeks for 20 patient. Lumbar stability exercise will be done 45 minutes per session. The control group will not receive any psychological intervention. Intervention 2: In the intervention group stability exercise and mindfulness cognitive therapy will be applied in 2 sessions per week during 8 weeks for 20 patient . Mindfulness cognitive therapy will be applied before stability exercise and each intervention will be done 45 minutes per session. The mindfulness cognitive therapy will be done by a psychologist for intervention group and it will be done based on a specific treatment protocol for 8 sessions. The basis of this treatment is relaxation. The focus of this program is on awareness enhancement, attention to cognitive and emotional factors and behavioral activation finally. Undecided - It is not yet known if there will be a plan to make this available Justification or reason for indecision in sharing IPD is There is no more information