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석종호,김태호 KEMA학회 2020 근골격계과학기술학회 Vol.4 No.2
Background: Scapular depression syndrome is associated with weakness or elongation in the upper trapezius and a lower pressure pain threshold. Purpose: This study aimed to compare the pressure pain thresholds of the upper trapezius and median nerve trunks and muscle activity during shoulder flexion before and after scapular alignment exercises and nerve mobilization in subjects with scapular depression alignment. Study design: Two-group pre- and post-test design Methods: The subjects were 30 men with scapular depression alignment aged 20–40 years old. Thirty subjects were randomly divided into the nerve mobilization group (n=15) and the scapular alignment exercise group. The scapular alignment exercise group repeated the scapular setting exercise 15 times a session while maintaining 1 min per trial, and the nerve mobilization group performed five sets of nerve mobilization, with set including 10, 12, 14, 16 and 20 times. The subjects were measured in terms of the pressure pain threshold and muscle activity during shoulder flexion. The pressure pain threshold was measured in the median nerve and upper trapezius. Muscle activity was measured in the upper trapezius, lower trapezius, and serratus anterior muscles during 120° shoulder flexion. Results: There was a significant increase in the pressure pain threshold of the upper trapezius before and after intervention in the scapular alignment exercise group (p<0.05). A significant increase in the muscle activity of the serratus anterior before and after intervention was observed in the scapular alignment exercise group (p<0.05), and a significant difference was found in the muscle activity of the serratus anterior between the two groups according to the intervention (p<0.05). Conclusions: The scapular alignment exercises enable subjects with scapular depression alignment to reduce the mechanical sensitivity of muscles and nervous tissues and bring immediate activation in muscle activity of serratus anterior. This study recommend that scapular alignment exercise could help scapular depression syndrome as a therapeutic exercise method in clinical field.
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