Comparison of the Muscle-tendon Complex Behavior in the Gastrocnemius During 4 Types of Human Vertical Jumping in vivo

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著者

    • Fukashiro Senshi
    • Sport Biomechanics, Graduate School of Interdisciplinary Information Studies, University of Tokyo

抄録

Behavior of fascicles and tendinous structures of the m. gastrocnemius medialis (MG) was quantitatively re-evaluated from the viewpoints of force-length and force-velocity relations during 4 types of human vertical jumping <i>in vivo</i>, based on our previous studies. Eight male subjects performed maximal-effort 1: ankle plantarflexion jumping (AJ) from the standing position, 2: squat jumping (SQJ) from the squat position, 3: counter movement jumping (CMJ) from the standing position, and 4: straight legged drop jumping (DJ) from a height of 0.20 m. Kinematic and kinetic data were obtained using a high-speed camera and a force platform system. Also, behavior of fascicles and tendinous structures were determined using ultrasonography. Vertical displacements of the body center of gravity from the standing position were 0.16m, 0.43m, 0.44m and 0.33m in AJ, SQJ, CMJ and DJ, respectively. During the take-off phase, there was no stretching of the fascicles of the MG in all jumping conditions. In AJ and SQJ, on the other hand, the fascicles of the MG shortened in the early take-off phase. As a result, 2.2J, 4.9J, 6.6J and 7.6J of elastic energy were stored in the tendinous structures of the MG in AJ, SQJ, CMJ and DJ, respectively. During the push-off phase, 2.1J (47% of total muscle-tendon complex work in the push-off phase), 4.4J (86%), 3.8J (79%) and 5.8J (75%) of the stored energy was reutilized in each of the conditions, respectively. The fascicles of the MG operated within the optimal range of the sarcomere force-length relationship during jumping. Also, the fascicles worked in the relatively low shortening velocity region of the instantaneous force-velocity relationship in all jumping conditions.

収録刊行物

  • International Journal of Sport and Health Science

    International Journal of Sport and Health Science (4), 298-302, 2006

    一般社団法人 日本体育学会

被引用文献:  1件中 1-1件 を表示

各種コード

  • NII論文ID(NAID)
    130000069672
  • 本文言語コード
    ENG
  • 資料種別
    雑誌論文
  • ISSN
    1348-1509
  • データ提供元
    CJP引用  J-STAGE 
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