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| 講演名 | 2009-01-19 11:55 Correlations between potentiation mechanisms of long-term plyometric training and performance; myoelectrical, chemomechanical potentiation and elastic energy utilization Yu-Kuang Wu・Lien Yu-Hui・Kwan-Hwa Lin・Tiffany Ting-Fang Shih・Tyng-Guey Wang・○Hsing-Kuo Wang（National Taiwan Univ.）  MI2008-62 |
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| 抄録 | （和） | This study measured potentiation effects of plyometric training (normalized electromyography in triceps surae, stiffness and elastic energy utilization of Achilles tendon) and investigated correlations between these effects and performances (voluntary electromechanical delay and jump height). Twenty-one subjects were randomly assigned to either the control group or to a training group that performed eight-weeks of plyometric training. Results: As compared with the performances before training, normalized electromyographies in soleus were significantly (p< or =0.001) increased after four weeks and eight weeks of training. Tendon stiffness (by daynamic ultrasonography), elastic energy storage, release and jump height collected after training were significantly increased (p<0.05), with a concomitantly reduced voluntary electromechanical delay (p=0.01). These variables also showed significant differences versus the control group (all p <0.05). Other variables remained un changed. Correlations were observed between tendon stiffness and either voluntary electromechanical delay (r=-0. 77, p=0.014) or jump height (r=0.54, p=0.031). Conclusions: Plyometric training specifically potentiated the normalized electromyography, tendon stiffness and elastic energy utilization in myotendinous complex of the triceps surae. Although these changes are possibly essential determinants, only increases of tendon stiffness were observed to correlate with performance improvements. |
| （英） | This study measured potentiation effects of plyometric training (normalized electromyography in triceps surae, stiffness and elastic energy utilization of Achilles tendon) and investigated correlations between these effects and performances (voluntary electromechanical delay and jump height). Twenty-one subjects were randomly assigned to either the control group or to a training group that performed eight-weeks of plyometric training. Results: As compared with the performances before training, normalized electromyographies in soleus were significantly (p< or =0.001) increased after four weeks and eight weeks of training. Tendon stiffness (by daynamic ultrasonography), elastic energy storage, release and jump height collected after training were significantly increased (p<0.05), with a concomitantly reduced voluntary electromechanical delay (p=0.01). These variables also showed significant differences versus the control group (all p <0.05). Other variables remained un changed. Correlations were observed between tendon stiffness and either voluntary electromechanical delay (r=-0. 77, p=0.014) or jump height (r=0.54, p=0.031). Conclusions: Plyometric training specifically potentiated the normalized electromyography, tendon stiffness and elastic energy utilization in myotendinous complex of the triceps surae. Although these changes are possibly essential determinants, only increases of tendon stiffness were observed to correlate with performance improvements. | |
| キーワード | （和） | tendon stiffness / energy utilization / / / / / / |
| （英） | tendon stiffness / energy utilization / / / / / / | |
| 文献情報 | 信学技報, vol. 108, no. 385, MI2008-62, pp. 25-30, 2009年1月. | |
| 資料番号 | MI2008-62 | |
| 発行日 | 2009-01-12 (MI) | |
| ISSN | Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 | |
| 著作権に ついて |
技術研究報告に掲載された論文の著作権は電子情報通信学会に帰属します．(許諾番号：10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| PDFダウンロード | MI2008-62 |
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| 研究会情報 | |
| 研究会 | MI |
| 開催期間 | 2009-01-19 - 2009-01-21 |
| 開催地（和） | 国立台湾大学(台北市) |
| 開催地（英） | National Taiwan University |
| テーマ（和） | 医用画像一般 |
| テーマ（英） | Medical Imaging |
| 講演論文情報の詳細 | |
| 申込み研究会 | MI |
| 会議コード | 2009-01-MI |
| 本文の言語 | 英語 |
| タイトル（和） | |
| サブタイトル（和） | |
| タイトル（英） | Correlations between potentiation mechanisms of long-term plyometric training and performance; myoelectrical, chemomechanical potentiation and elastic energy utilization |
| サブタイトル（英） | |
| キーワード(1)（和/英） | tendon stiffness / tendon stiffness |
| キーワード(2)（和/英） | energy utilization / energy utilization |
| キーワード(3)（和/英） | / |
| キーワード(4)（和/英） | / |
| キーワード(5)（和/英） | / |
| キーワード(6)（和/英） | / |
| キーワード(7)（和/英） | / |
| キーワード(8)（和/英） | / |
| 第1著者 氏名（和/英/ヨミ） | Yu-Kuang Wu / Yu-Kuang Wu / |
| 第1著者 所属（和/英） | National Taiwan University (略称： National Taiwan Univ.) National Taiwan University (略称： National Taiwan Univ.) |
| 第2著者 氏名（和/英/ヨミ） | Lien Yu-Hui / Lien Yu-Hui / |
| 第2著者 所属（和/英） | National Taiwan University (略称： National Taiwan Univ.) National Taiwan University (略称： National Taiwan Univ.) |
| 第3著者 氏名（和/英/ヨミ） | Kwan-Hwa Lin / Kwan-Hwa Lin / |
| 第3著者 所属（和/英） | National Taiwan University (略称： National Taiwan Univ.) National Taiwan University (略称： National Taiwan Univ.) |
| 第4著者 氏名（和/英/ヨミ） | Tiffany Ting-Fang Shih / Tiffany Ting-Fang Shih / |
| 第4著者 所属（和/英） | National Taiwan University (略称： National Taiwan Univ.) National Taiwan University (略称： National Taiwan Univ.) |
| 第5著者 氏名（和/英/ヨミ） | Tyng-Guey Wang / Tyng-Guey Wang / |
| 第5著者 所属（和/英） | National Taiwan University (略称： National Taiwan Univ.) National Taiwan University (略称： National Taiwan Univ.) |
| 第6著者 氏名（和/英/ヨミ） | Hsing-Kuo Wang / Hsing-Kuo Wang / |
| 第6著者 所属（和/英） | National Taiwan University (略称： National Taiwan Univ.) National Taiwan University (略称： National Taiwan Univ.) |
| 講演者 | 第6著者 |
| 発表日時 | 2009-01-19 11:55:00 |
| 発表時間 | 10分 |
| 申込先研究会 | MI |
| 資料番号 | MI2008-62 |
| 巻番号（vol） | vol.108 |
| 号番号（no） | no.385 |
| ページ範囲 | pp.25-30 |
| ページ数 | 6 |
| 発行日 | 2009-01-12 (MI) |
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