Introduction: Lower cross syndrome (LCS) is a musculoskeletal condition with a pattern of muscle weakness and stiffness. Limitation of the range of motion of the thigh due to muscle stiffness and other joint tissues leads to lumbar-pelvic or pelvifemoral rhythm disorder and as a result, lack of coordination of the spine, for example, the stiffness of the iliopsoas muscle increases the anteversion
of the femur and increases the lumbar hyperlordosis in standing, which It is one of the consequences of this abnormality. Along with new scientific advances, new exercises have been developed to correct such abnormalities. Recently, the National Academy of Sports Medicine has proposed a new corrective exercise chain protocol for restoring muscle imbalances that includes the four phases of restraint, inhibit, lengthen, activation and integrated dynamic movement . The aim of this study is the effect of eight weeks of NASM corrective exercises on hip flexion range of motion in women with lower crossed syndrome.
Method: The current research is a randomized clinical trial study in which 30 subjects in the age range of 18 to 30 years were divided into two control and experimental groups. Mixed analysis of variance was used to evaluate differences between groups. Also, the impact factor was calculated for each group. Data analysis was done at a significance level of P<0.05 and using SPSS version 26 software.
Conclusion: According to eight weeks of the NASM corrective exercise protocol, the results showed that the exercises within the framework of this protocol can help to resolve the limitation of the hip flexion range of motion, which is one of the consequences of the lower cross syndrome abnormality.