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KMID : 0357220220340010006
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Journal of Korean Society Physical Therapy
2022 Volume.34 No. 1 p.6 ~ p.11
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Comparison of the Lower Trapezius Muscle Activity during Three Different Shoulder Flexion Exercises in Healthy Subjects
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Hwang Byeong-Hun
Jang Tae-Jin
Jeon In-Cheol
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Abstract
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Purpose: This study investigated the muscle activity of the lower trapezius (LT) during three different shoulder flexion exercises.
Methods: Twenty-three subjects between 20 and 25 years of age were enrolled. The subjects were asked to perform three different shoulder flexion exercises: 1) shoulder flexion in prone (SFP), 2) shoulder flexion in push-up with a swiss ball (SFPUS) and 3) shoulder flexion in a quadruped position with a swiss ball (SFQPS) in random order. The muscle activity of LT during each shoulder flexion exercise was measured by using surface electromyography. The muscle activity of LT was compared using one-way analysis of variance (ANOVA) and Bonferroni post hoc test among three different shoulder flexion exercises. The statistical significance level was set at α=0.01.
Results: The muscle activity of LT was significantly different among three different shoulder flexion exercises (SFP, SFPUS, and SFQPS).
The LT muscle activity with SFQPS exercise was greater than SFP and SFPUS exercises (p<0.01). There was no significant difference in LT muscle activity between SFP and SFPUS exercises (p>0.01).
Conclusion: The LT muscle activity was greater during SFQPS than SFP and SFPUS. Therefore, SFQPS exercise can be recommended for selectively activation of LT muscle.
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KEYWORD
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Base of support, Lower trapezius, Shoulder flexion, Muscle activation
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