سورین شیخ زاده

  Abstract

Background: In today's society, yoga is recognized not only as a therapeutic and meditative practice but also as a form of exercise with a wide range of styles and intensities. The number of individuals practicing yoga is increasing worldwide. Many yoga poses involve supporting part or all of the body weight on the shoulder girdle and arms, which may increase the risk of injury. The present study aims to investigate the differences in electromyographic (EMG) activity of six muscles: the upper trapezius, lower trapezius, serratus anterior, infraspinatus, posterior deltoid, and teres major in female yoga athletes with and without scapular dyskinesis during two yoga poses: Chakrasana and Pincha Mayurasana.

Materials and methods: A total of ۲۴ female athletes aged ۱۸ to ۵۵ years, including ۱۲ with scapular dyskinesis and ۱۲ without, participated in this study. EMG data were collected to measure the peak muscle activity of the shoulder girdle muscles across six movements, with a specific focus on their electrical activity during the two yoga poses, Chakrasana and Pincha Mayurasana. Data analysis was performed using    software version ۲۷. Statistical methods included the Shapiro-Wilk test for assessing data normality, and independent t-tests for normally distributed data and Mann-Whitney U tests for non-normal data, with a significance level set at p ? ۰.۰۵.

Results: The results showed no statistically significant difference in the electrical activity of five selected muscles between the healthy group and those with scapular dyskinesis. However, a significant difference was observed in the infraspinatus muscle activity between the two groups, with greater activity in the control group compared to the dyskinesis group.

This study suggests that scapular dyskinesis, a condition that can affect the movement and function of the shoulder joint, does not influence the activity of the shoulder girdle muscles during the two yoga poses examined, except for the infraspinatus muscle. However, it is possible that scapular dyskinesis may influence the performance of these muscles during training and fatigue.

Key words: Electromyography, scapula dyskinesia, yoga movements