برﺭﺳﻲ ﺗﺄﺛﻴﺮﺍﺕ 8 ﻫﻔﺘﻪ ﺗﻤﺮﻳﻦ ﺍﺻﻼﺣﻲ ﺑﺎ ﺑﺎﻧﺪ ﺍﻻﺳﺘﻴﮑﻲ ﺑﺮ ﻃﻴﻒ ﻓﺮﮐﺎﻧﺲ ﻧﻴﺮﻭﻫﺎﻱ ﻋﮑﺲﺍﻟﻌﻤﻞ ﺯﻣﻴﻦ ﺩﺭ ﭘﺴﺮﺍﻥ ﺟﻮﺍﻥ ﻣﺒﺘﻼﺑﻪ ﻋﺎﺭﺿﻪ ﺯﺍﻧﻮﻱ ﺿﺮﺑﺪﺭﻱ ﻃﻲ ﺩﻭﻳﺪﻥ: ﻳﮏ ﻣﻄﺎﻟﻌﻪ ﮐﺎﺭﺁﺯﻣﺎﻳﻲ ﺑﺎﻟﻴﻨﻲ ﺗﺼﺎﺩﻓﻲ

INVESTIGATING THE EFFECT OF 8 WEEKS OF CORRECTIVE EXERCISE WITH AN ELASTIC BAND ON THE FREQUENCY SPECTRUM OF GROUND REACTION FORCES IN YOUNG BOYS WITH GENU VALGUM DURING RUNNING: A RANDOMIZED CLINICAL TRIAL STUDY

ﭘﻴﺶﺯﻣﻴﻨﻪ ﻭ ﻫﺪﻑ: ﺍﻓﺰﺍﻳﺶ ﺯﺍﻭﻳﻪ ﻭﺍﻟﮕﻮﺱ ﺑﺎ ﺍﻳﺠﺎﺩ ﺗﻐﻴﻴﺮﺍﺗﻲ ﺩﺭ ﺭﺍﺳﺘﺎﻱ ﺍﻧﺪﺍﻡ ﺗﺤﺘﺎﻧﻲ، ﻣﻲ¬ﺗﻮﺍﻧﺪ ﺗﻐﻴﻴﺮﺍﺗﻲ ﺩﺭ ﺭﺍﺳﺘﺎﻱ ﻣﺮﻛﺰ ﺛﻘﻞ ﺑﺪﻥ ﻧﺴﺒﺖ ﺑﻪ ﺳﻄﺢ ﺍﺗﻜﺎ ﺍﻳﺠﺎﺩ ﻭ ﻛﻨﺘﺮﻝ ﺗﻌﺎﺩﻝ ﺭﺍ ﺩﭼﺎﺭ ﻣﺤﺪﻭﺩﻳﺖ ﮐﻨﺪ. ﻫﺪﻑ ﺍﺯ ﭘﮋﻭﻫﺶ ﺣﺎﺿﺮ، ﺑﺮﺭﺳﻲ ﺗﺄﺛﻴﺮﺍﺕ ﻳﮏ ﺩﻭﺭﻩ ﺗﻤﺮﻳﻨﺎﺕ ﺍﺻﻼﺣﻲ ﺑﺎ ﺍﺳﺘﻔﺎﺩﻩ ﺍﺯ ﺑﺎﻧﺪ ﺍﻻﺳﺘﻴﮑﻲ ﺭﻭﻱ ﻃﻴﻒ ﻓﺮﮐﺎﻧﺲ ﻧﻴﺮﻭﻫﺎﻱ ﻋﮑﺲ¬ﺍﻟﻌﻤﻞ ﺯﻣﻴﻦ ﺩﺭ ﭘﺴﺮﺍﻥ ﺟﻮﺍﻥ ﻣﺒﺘﻼﺑﻪ ﺯﺍﻧﻮﻱ ﺿﺮﺑﺪﺭﻱ ﻃﻲ ﺩﻭﻳﺪﻥ ﺑﻮﺩ. ﻣﻮﺍﺩ ﻭ ﺭﻭﺵ ﮐﺎﺭ: ﭘﮋﻭﻫﺶ ﺣﺎﺿﺮ ﺍﺯ ﻧﻮﻉ ﮐﺎﺭﺁﺯﻣﺎﻳﻲ ﺑﺎﻟﻴﻨﻲ ﺑﻮﺩ. 24 ﺩﺍﻧﺸﺠﻮﻱ ﭘﺴﺮ ﻣﺒﺘﻼﺑﻪ ﺯﺍﻧﻮﻱ ﺿﺮﺑﺪﺭﻱ )30-20 ﺳﺎﻝ( ﺑﻪﺻﻮﺭﺕ ﺗﺼﺎﺩﻓﻲ ﺩﺭ ﺩﻭ ﮔﺮﻭﻩ ﮐﻨﺘﺮﻝ ﻭ ﺗﺠﺮﺑﻲ ﻗﺮﺍﺭ ﮔﺮﻓﺘﻨﺪ. ﺗﻤﺮﻳﻨﺎﺕ ﺍﺻﻼﺣﻲ ﺑﻪ ﻣﺪﺕ 8 ﻫﻔﺘﻪ ﺑﺎ ﺍﺳﺘﻔﺎﺩﻩ ﺍﺯ ﺑﺎﻧﺪ ﺍﻻﺳﺘﻴﮑﻲ ﺑﺮﺍﻱ ﮔﺮﻭﻩ ﺗﺠﺮﺑﻲ ﺍﺟﺮﺍ ﺷﺪ. ﻧﻴﺮﻭﻫﺎﻱ ﻋﮑﺲ¬ﺍﻟﻌﻤﻞ ﺯﻣﻴﻦ ﺑﻪﻭﺳﻴﻠﻪ ﺩﺳﺘﮕﺎﻩ ﺻﻔﺤﻪ ﻧﻴﺮﻭ ﺑﺮﺗﮏ )Bertec Corporation, Columbus, OH( ﺛﺒﺖ ﮔﺮﺩﻳﺪ. ﺟﻬﺖ ﺗﺤﻠﻴﻞ¬ﻫﺎﻱ ﺁﻣﺎﺭﻱ ﺍﺯ ﻧﺮﻡﺍﻓﺰﺍﺭ SPSS V21 ﻭ ﺁﺯﻣﻮﻥ ﺗﺤﻠﻴﻞ ﻭﺍﺭﻳﺎﻧﺲ ﺑﺎ ﺍﻧﺪﺍﺯﻩ-ﻫﺎﻱ ﺗﮑﺮﺍﺭﻱ )Repeated measure ANOVA( ﺩﺭ ﺳﻄﺢ ﻣﻌﻨﻲ¬ﺩﺍﺭﻱ 0/05 ﺍﺳﺘﻔﺎﺩﻩ ﺷﺪ. ﻳﺎﻓﺘﻪﻫﺎ: ﻧﺘﺎﻳﺞ ﭘﮋﻭﻫﺶ ﺣﺎﺿﺮ ﻧﺸﺎﻥﺩﻫﻨﺪﻩ ﮐﺎﻫﺶ ﻣﺆﻟﻔﻪ ﻣﻴﺎﻧﻪ ﻓﺮﮐﺎﻧﺲ ﺩﺭ ﺭﺍﺳﺘﺎﻱ ﻗﺪﺍﻣﻲ-ﺧﻠﻔﻲ ﮔﺮﻭﻩ ﺗﺠﺮﺑﻲ ﻃﻲ ﭘﺲ¬ﺁﺯﻣﻮﻥ ﺩﺭ ﻣﻘﺎﻳﺴﻪ ﺑﺎ ﭘﻴﺶ¬ﺁﺯﻣﻮﻥ ﺑﻮﺩ )0/025=P؛ 3/921=d(. ﻫﻤﭽﻨﻴﻦ ﺩﺭ ﮔﺮﻭﻩ ﺗﺠﺮﺑﻲ ﻣﺆﻟﻔﻪ ﺑﺎﻧﺪ ﻓﺮﮐﺎﻧﺲ ﻧﻴﺰ ﮐﺎﻫﺶ ﻣﻌﻨﻲ¬ﺩﺍﺭﻱ ﺭﺍ ﺩﺭ ﺭﺍﺳﺘﺎﻱ ﻗﺪﺍﻣﻲ-ﺧﻠﻔﻲ ﻃﻲ ﭘﺲ¬ﺁﺯﻣﻮﻥ ﺩﺭ ﻣﻘﺎﻳﺴﻪ ﺑﺎ ﭘﻴﺶ¬ﺁﺯﻣﻮﻥ ﻧﺸﺎﻥ ﺩﺍﺩ )0/028=P؛ 3/843=d(. ﺑﺤﺚ ﻭ ﻧﺘﻴﺠﻪﮔﻴﺮﻱ: ﺑﺎ ﺗﻮﺟﻪ ﺑﻪ ﮐﺎﻫﺶ ﻣﻴﺎﻧﻪ ﻓﺮﮐﺎﻧﺲ، ﻣﻲ¬ﺗﻮﺍﻥ ﻧﺘﻴﺠﻪ ﮔﺮﻓﺖ ﺗﻤﺮﻳﻨﺎﺕ ﺍﺻﻼﺣﻲ ﻣﻮﺭﺩﺍﺳﺘﻔﺎﺩﻩ ﺗﻮﺍﻧﺴﺘﻪ ﻧﻴﺮﻭﻫﺎﻱ ﻭﺍﺭﺩﻩ ﺭﺍ ﺩﺭ ﺟﻬﺖ ﻗﺪﺍﻣﻲ-ﺧﻠﻔﻲ ﮐﺎﻫﺶ ﺩﻫﺪ. ﺑﺎ ﮐﺎﻫﺶ ﺑﺎﻧﺪ ﻓﺮﮐﺎﻧﺲ ﻃﻲ ﺗﻤﺮﻳﻨﺎﺕ ﺍﺻﻼﺣﻲ ﻧﻴﺰ ﻣﺸﺎﺭﮐﺖ ﻭ ﻓﻌﺎﻟﻴﺖ ﺍﺟﺮﺍ ﺣﺮﮐﺘﻲ ﮐﺎﻫﺶ ﻳﺎﻓﺘﻪ ﺍﺳﺖ.

Background & Aims: Increasing the angle of the valgus by making changes to the lower limbs can cause changes in the center of gravity of the body relative to the level of reliance and limit balance control. The aim of this study was to investigate the effects of a corrective exercise course using an elastic band on the frequency spectrum of ground reaction forces in young boys with genu valgum during running. Materials & Methods: The present study was a clinical trial. 24 male students with genu valgum (20-30 years) were randomly assigned to control and experimental groups. Corrective exercises were performed for 8 weeks using an elastic band for the experimental group. Ground reaction forces were recorded by the Bertec force plate. For statistical analysis, SPSS V21 software and analysis of repeated measure ANOVA were used at a significance level of 0.05. Results: The results of the present study showed a decrease in the median frequency in the anterior-posterior direction of the experimental group during the post-test compared to the pre-test (p = 0.025; d = 3.921). Also, in the experimental group, the frequency band component showed a significant decrease in anterior-posterior direction during the post-test compared to pre-test (p = 0.028; d = 3.843). Conclusion: Due to the reduction in median frequency, it can be concluded that the corrective exercises used were able to reduce the incoming forces in the anterior-posterior direction. With the reduction of the frequency band during corrective exercises, the participation and activity of motor performance have also decreased