IRCT20180511039612N1 IRCT 2018-07-02 Tehran University of Medical Sciences immediate effect of dry needling on hamstring muscle flexibility Study of the immediate and after one week effect of dry needling on chronic non-specific low back pain women with hamstring shortness: A placebo controlled RCT 2018-04-21 anticipated 10 Complete https://irct.ir/trial/31278 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Used, Assignment: Parallel, Purpose: Treatment, Randomization description: To randomly assign the participants to the dry needle treatment group and the control group, each participant is assigned a number and then, using the randomized block method, each of the numbers is assigned a drying needling or placebo group ( 1 or 2). These codes are placed inside sealed envelopes, Blinding description: Using sham needle in the placebo group will cause blindness to the participants. The use of sealed envelopes in the random allocation of participants in a therapeutic groups will result in blind assessments of the consequences. N/A Non-specific chronic low back pain. Intervention 1: Intervention group:hamstring muscle is needling cone shape fast in-fast out during a therapeutic session at 3 points of muscle end plate for 1 minute at each point bilaterally. Intervention 2: Control group: on the muscle end plate is taping by sham needle for 1 minute at each point bilaterally. Yes - There is a plan to make this available What will be shared: ... When: ... To whom: ... Conditions: ... Where to obtain: ... How to obtain: ... Comments: