Effect of Neuromuscular training on Balance and Electrical Activity of Some Lower Extremity Muscles in Females with Generalized Joint Hypermobility Syndrome

Oral Presentation
Paper ID : 1641-12THCONG
Oral / Poster Presentation File: 12th Cong Presentation_Torkan abbasi.mp4 
1M.A. in sports injuries and corrective exrecises, department of physical education and sport science, Kharazmi Universirt, Tehran, Iran.
2. Associate Professor, Biomechanics and sport injuries faculty, department of physical education and sport science, Kharazmi Universirt, Tehran, Iran.
3- Assistant Prof., Dept.of Sport science, Faculty of Physical Education and psychology, Shiraz University, Shiraz, Iran
Hypermobility is known to be associated with joint and muscle pain, decreased function, increased joint position sense error and ultimately these cause joint instability and disturbances in their balance. It has also been reported to have a differences in the level of muscle activities. The purpose was to determine the effect of neuromuscular training on balance and the electrical activity of some lower extremity muscles in hypermobile females. Twenty-four females with generalized joint hypermobility syndrome participated voluntarily in this study. The subjects were randomly divided into Control and experimental groups. The muscle activity of the some lower extremity muscles; vastus medialis, rectus femoris, vastus lateralis, semitendinosus, biceps femoris and medial gastrocnemius was measured during drop landing by surface electromyography and static and dynamic balance was assessed respectively by bass stick and Y test. Then experimental group performed training program for six weeks. Finally Shapirovilk test and covariance was used to data analyzing. The results showed, the neuromuscular training improves balance (static and dynamic in anterior and medial lateral direction) and the level of feed-forward activity of the Vastus medialis, Vastus lateralis, semitendinosus and medial gastrocnemius and the feedback muscle activity of Vastus Medialis and Vastus lateralis increased significantly. After 6-week neuromuscular training, the increased sensitivity of the joint receptors and muscle feedback and feed-forward activities has led to moderating balance responses. Considering the high impact of the training group, it is suggested that neuromuscular training program be used to improve the essential factors for the stability of females with generalized joint hypermobility syndrome.