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Elsevier, Manual Therapy, (25), p. 11-18

DOI: 10.1016/j.math.2016.05.331

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Instruction and feedback for conscious contraction of the abdominal muscles increases the scapular muscles activation during shoulder exercises

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This paper is available in a repository.

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Abstract

Purpose: The study aimed to investigate the effect of the instruction for conscious contraction of the abdominal muscles on the scapulothoracic muscles activation during shoulder exercises. Design: Repeated measures design in a single group, pre-post instruction. Methods: Sixty healthy male and female subjects (mean age 23.5 +/- 3 years) volunteered for this study. Two isometric and three dynamic exercises for the scapulothoracic muscles, focusing on the serratus anterior muscle were assessed before and after familiarization training, standardized verbal, and tactile feedback applied to encourage abdominal muscle contraction. Repeated measures ANOVA and Bonferroni post-hoc test were used to compare normalized EMG amplitudes. Results: Instruction increased EMG amplitude only for serratus anterior muscle during isometric exercises (Inferior Glide and Isometric Low Row). Conscious contraction of the abdominal muscles resulted in significant increase (p