Identifying the Best Indicator of Assessing the Athletes Balance in the Sudden Perturbation Test

• Main Authors: ebrahim abdi, Mansour Eslami, Mohammad r Taghi Pou
• Format: Article
• Language: fas
• Published: Islamic Azad University, Hamedan Branch 2016-06-01
• Series: Biyumikānīk-i varzishī
• Subjects: Time to stability; center of pressure speed; center of pressure travel distance; sudden perturbation and balance
• Online Access: http://biomechanics.iauh.ac.ir/browse.php?a_code=A-10-103-1&slc_lang=en&sid=1

Objective: The aims of this study were to identify the most appropriate indicator to assess the balance in the sudden perturbation test conditions. Methods: In this study, 13 freestyle national wrestlers at the age of 20.5±2.4 and 13 normal subjects with average age of 23.5±1.4 were used recruited. Balancing test was carried out under two conditions: standing with the guard (guard) and stand feet shoulder width apart (standing). To measure the balance parameters, the RS-scan system was used, and for external perturbation movable plant with weights equal to 12% of the mass was used. The independent t-test for statistical analysis in each direction between the two groups was used. Results: Center of pressure (CoP) travel distance in the anterior, posterior and external directions, wrestlers were more than those in normal individuals in both positions; for guard position (p = 0.01, p = 0.01, p = 0.5) and (p = 0.2, p = 0.5, p = 0.01) in stand position. The COP average speeds in the anterior, posterior and external directions in both conditions were more in wrestlers than that normal group, (p = 0.01, p = 0.08, p = 0.01) in the guard position and (p = 0.27, p = 0.1, p = 0.01) in the stand position. The wrestlers were able to get stable as soon as possible in both positions and in four direction (p=0.001). Conclusion: Athletes in sudden perturbation want to reach equilibrium and stability in shorter time by increasing speed CoP. Thus it seems, time to stability can be a good indicator for balance evaluating.