“…These reports indicate a significant effect of PIR on the minimization of pain and increasing the range of motion in the joints [ 16 , 27 , 32 , 33 , 34 ], accompanied by a decrease in muscle electrical activity [ 35 ]. Although a wide variety of MR techniques can be found in the literature [ 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 ]. Authors assessing the outcomes of MR procedures, methodically consistent with the approach carried out in this study, indicate their effectiveness in increasing the pain-free range of motion [ 17 ], reducing pain [ 17 , 36 , 37 ], improving musculoskeletal function [ 36 , 37 ] and reducing muscle stiffness [ 38 ].…”