Trunk EMG during tennis forehand stroke
碩士 === 國立臺灣師範大學 === 運動科學研究所 === 101 === Purpose: To investigate the change of electromyography (EMG) on trunk muscles during a tennis forehand stroke in different stances and directions. Methods: Twelve advanced males tennis players (right handed) performed two stances (open & square stance) and...
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ndltd-TW-101NTNU54210032016-08-05T04:09:33Z http://ndltd.ncl.edu.tw/handle/66289612655402860415 Trunk EMG during tennis forehand stroke 網球正拍擊球對軀幹肌電之影響 Tai, Yu-Lin 戴幼琳 碩士 國立臺灣師範大學 運動科學研究所 101 Purpose: To investigate the change of electromyography (EMG) on trunk muscles during a tennis forehand stroke in different stances and directions. Methods: Twelve advanced males tennis players (right handed) performed two stances (open & square stance) and directions (crosscourt & down the line) forehand stroke. The left and right external oblique (LEO & REO), latissimus dorsi (LLD & RLD), and erector spinae (LES & RES) EMGs were collected and compared. The image time of every motion recorded by CASIO digital camera was divided into the preparation, acceleration and follow through phases. A 3-way ANOVAs of repeated measures (α = .05) and LSD for posteriori comparison were used for analysis. Results: The LEO muscle activation was affected by directions. The EMG of crosscourt hits was greater than down the line hits. The interaction of directions and phases impacted on REO, while LES was influenced by the interaction of stances and phases, but they both were no significant in three phases. Also, six muscles were affected by phases. The activation in the acceleration phase were the hightest, except for the LES, the transforming percentage of peak was greater in the preparation phase to the follow through phase, others five muscles changed from the follow through to the preparation phase. Conclusion: It’s important to train LEO muscle to intensify forehand drive crosscourt. During a tennis forehand stroke, LES muscle will activate first. It is the key point to start the force for the trunk with forward racket swing. Hsieh, Shen-Yu 謝伸裕 2013 學位論文 ; thesis 67 zh-TW |
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zh-TW |
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Others
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碩士 === 國立臺灣師範大學 === 運動科學研究所 === 101 === Purpose: To investigate the change of electromyography (EMG) on trunk muscles during a tennis forehand stroke in different stances and directions. Methods: Twelve advanced males tennis players (right handed) performed two stances (open & square stance) and directions (crosscourt & down the line) forehand stroke. The left and right external oblique (LEO & REO), latissimus dorsi (LLD & RLD), and erector spinae (LES & RES) EMGs were collected and compared. The image time of every motion recorded by CASIO digital camera was divided into the preparation, acceleration and follow through phases. A 3-way ANOVAs of repeated measures (α = .05) and LSD for posteriori comparison were used for analysis. Results: The LEO muscle activation was affected by directions. The EMG of crosscourt hits was greater than down the line hits. The interaction of directions and phases impacted on REO, while LES was influenced by the interaction of stances and phases, but they both were no significant in three phases. Also, six muscles were affected by phases. The activation in the acceleration phase were the hightest, except for the LES, the transforming percentage of peak was greater in the preparation phase to the follow through phase, others five muscles changed from the follow through to the preparation phase. Conclusion: It’s important to train LEO muscle to intensify forehand drive crosscourt. During a tennis forehand stroke, LES muscle will activate first. It is the key point to start the force for the trunk with forward racket swing.
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author2 |
Hsieh, Shen-Yu |
author_facet |
Hsieh, Shen-Yu Tai, Yu-Lin 戴幼琳 |
author |
Tai, Yu-Lin 戴幼琳 |
spellingShingle |
Tai, Yu-Lin 戴幼琳 Trunk EMG during tennis forehand stroke |
author_sort |
Tai, Yu-Lin |
title |
Trunk EMG during tennis forehand stroke |
title_short |
Trunk EMG during tennis forehand stroke |
title_full |
Trunk EMG during tennis forehand stroke |
title_fullStr |
Trunk EMG during tennis forehand stroke |
title_full_unstemmed |
Trunk EMG during tennis forehand stroke |
title_sort |
trunk emg during tennis forehand stroke |
publishDate |
2013 |
url |
http://ndltd.ncl.edu.tw/handle/66289612655402860415 |
work_keys_str_mv |
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