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KMID : 1812820170010010031
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Journal of Korean Dental Hygiene Science
2017 Volume.1 No. 1 p.31 ~ p.35
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Selective Activation of Thoracic Extensor Muscles during 3 Different Trunk Extensor Strengthening Exercise
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Ha Sung-Min
Jung Sung-Hoon
Kim Jun-Hee
Gwak Gyeong-Tae
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Abstract
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Background: Although there are many exercises to selectively strengthen the thoracic extensor, general trunk extensor strengthening exercises lead to pain and excessive lumbar extension.
Purpose: We investigated the most effective exercise among three thoracic extensor strengthening exercises (active prone thoracic extension, active prone thoracic hyper-extension, and active sitting thoracic extension) based on selective activity of the thoracic spine extensors.
Study design: Comparative, repeated measures design.
Methods: Sixteen healthy participants performed three thoracic extensor strengthening exercises. Electromyograph (EMG) activity was measured in the longissimus thoracis (LT), iliocostalis thoracis (ICT), and iliocostalis lumborum (ICL) muscles.
Results: The ICT/ICL and LT/ICL composition ratios were greatest in active sitting thoracic extension compared to other exercises.
Conclusions: We recommend active sitting thoracic extension exercise for selective strengthening of the thoracic spine extensor.
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KEYWORD
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Active sitting thoracic extension, Electromyography, Selective strengthening, Thoracic extensor strengthening exercise, Thoracic spine extensor
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