The effect of PNF training on knee joint position sense, balance and hamstring length in girls with hamstring short
Poster Presentation XML
2Karaj Islamic Azad University
3Assistant Professor, Department of Sport Injuries and Corrective Exercises, College of Physical Education, Karaj Branch, Islamic Azad University, Karaj, Iran
Introduction: Muscle imbalance is one of the factors contributing to the development of musculoskeletal disorders, which results in unnatural forces entering the system.This lack of imbalance is usually due to muscle weakness on the one hand and shortness of the muscles on the other. It has been shown that shortness of hamstring muscles can cause destroy of the natural arches of the spine and lead to abnormal stresses , dysfunction of sacroiliac joints and low back pain. Situational deviation due to lack of imbalance in the natural arches of the spine of the body is created, which totally reduces the flexibility. Therefore, it can be said that reducing the natural range of motion and stiffness of connective tissue is one of the most common musculoskeletal problems.The purpose of this study was to investigate the effect of a PNF Stretching on knee joint balance, balance and hamstring length in In girls with hamstring short.
Methodology: Thirty girls aged between 18 and 25 years old with hamstring shortage, who were evaluated using SLR test, participated in the study and were randomly assigned Were placed to either experimental (n = 15) and control (n = 15). Static balance measurements were performed using BESS test and dynamic balance measurements using SEBT test. Angle reconstruction was also used to assess knee joint knee sensitivity and knee goniometer application. The PNF exercise program was a type of HOlD RELAX stretching technique, which lasted for eight weeks with three sessions per week. After completing the training period, the variables of the research were re-measured. To analyze the data, one-variable and multivariate covariance analysis was used at the level of 0.01.
Results: The results of this study showed that exercise protocol (PNF) on knee joint position sensation at 30 degrees, 45 degrees and 60 degrees, static balance at steady and unstable surfaces, dynamic balance in right, left and back directions, and also the length of hamstrings in shorter girls, the hamstring muscles played a significant role and improved these variables.