![]() ![]() The UT/MT and UT/LT ratios were similar between conditions for all 4 exercises.Ĭonscious correction of scapular orientation during the prone extension and sidelying external rotation exercises can be used to increase the activation level in the 3 sections of the trapezius in overhead athletes with scapular dyskinesis. There was no difference between conditions for sidelying forward flexion and prone horizontal abduction with external rotation. With conscious correction of scapular orientation, activation levels of the 3 sections of the trapezius muscle significantly increased during prone extension (mean ± SD difference: UT, 5.9% ± 8.6% maximal voluntary isometric contraction MT, 13.8% ± 11.0% MVIC LT, 9.8% ± 10.8% MVIC P<.05) and sidelying external rotation (UT, 2.2% ± 4.4% MVIC MT, 6.7% ± 10.6% MVIC LT, 13.3% ± 24.4% MVIC P<.05). Repeated-measures analyses of variance were used to determine if a voluntary scapular orientation correction strategy influenced the activation levels of the different sections of the trapezius during each exercise. However, the extent to which conscious correction of scapular orientation impacts trapezius muscle activation levels during these exercises is unknown.Ībsolute (upper trapezius, middle trapezius, lower trapezius ) and relative (UT/MT and UT/LT) muscle activation levels were determined with surface electromyography in 30 asymptomatic overhead athletes with scapular dyskinesis, during 4 selected exercises performed with and without conscious correction of scapular orientation. Previous research has led to the recommendation of 4 exercises for training of the trapezius muscle: prone extension, sidelying external rotation, sidelying forward flexion, and prone horizontal abduction with external rotation. To assess the effect of conscious correction of scapular orientation on the activation of the 3 sections of the trapezius muscle during shoulder exercises in overhead athletes with scapular dyskinesis.
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