IRCT20190419043319N1 IRCT 2021-11-30 Yazd University of Medical Sciences The effect of ozone-oxygen gas on pain and activity in patients with lumbar spinal stenosis Comparison of ozone-oxygen gas injection and high power laser in paravertebral muscles on pain and activity in patients with lumbar spinal stenosis 2019-04-29 anticipated 84 Complete https://irct.ir/trial/39191 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Used, Assignment: Parallel, Purpose: Treatment, Randomization description: After selecting the sample, they were randomly divided into three groups. In this study, individuals were assigned to three groups using permutation block method. In this method, A represents the person receiving the first intervention, B represents the person receiving the second intervention, and C represents the person receiving the placebo. Considering blocks of size 6, they were categorized into the desired permutations and patients were classified by random selection from the permutation envelope, Blinding description: For the double blinding process, after selecting patients, they are told that in all groups, the treatment methods are uncomplicated and could reduce pain. The treatment can be placebo (normal saline), ozone-oxygen or high power laser. The patient and the treating physician are not aware of the nature of the treatment. Each patient and the drug used for him is identified by the same number. For example, patient number 8 and drug number 8. N/A lumbar spinal stenosis. Intervention 1: Intervention group 1: intramuscular paravertebral injection of oxygen –ozone with 10 microgram/cc - 3 times at week for 5 weeks. Intervention 2: Intervention group 2: high intensity laser 30 W; dose 100 J / cm². 5 15-minute sessions per week for 2 weeks. Intervention 3: Control group: Exercises included lower trunk rotation; knee to chest; pelvic tilt, which strengthens and stabilizes the muscles of the abdomen, back and pelvis. All treatment groups were instructed to exercise three times a day for 2 weeks. No - There is not a plan to make this available Justification or reason for not sharing IPD is There is no more information