EFFECTS OF CORRECTION PROGRAM ON BACK MUSCLE FUNCTIONAL ASYMMETRY AMONG SQUASH PLAYERS

Back muscle functional asymmetry is most common among squash players by their regular unilateral movement while playing. This study analyzed the effect of the body alignment correction program on asymmetry (left-right) developed squash players. Twenty eight asymmetry developed squash players were considered. All of them were male, right-handed and more than four years of experience in playing squash. Electromyography of back muscles (erector spinae and trapezius) and moiré topography of back were statistically compared before and after the twelve week alignment correction program that include various training. Results showed that the scapular inclination was decreased (p < 0.05) and resulting scapular in anatomically straight. To alignment, a decrease was observed in right side inclination and increase in left side inclination, which result in decreased (p < 0.05) left-right asymmetry rate and increased left-right balance. Significant (p < 0.01) decrease in right-side erector spinae muscle activity was observed and identified that erector spinae muscle contributed more on left-right asymmetry than the trapezius muscle. It was witnessed that training program decreased the muscle activity of the stronger side rather than increasing the weaker side. To conclude, the body alignment correction program was effective in reducing stronger side muscle activity and assisting to maintain left-right symmetry