Evaluation of rapid force development using the maximum force produced by pulse height control

DOI Web Site Open Access
  • ONO Seiji
    Faculty of Health and Sport Science, University of Tsukuba
  • ITAYA Atsushi
    Department of Physical Education, Asahikawa Campus, Hokkaido University of Education
  • HAYAMI Tatsuya
    School of Humanities and Social Science, Shinshu University
  • OHYAMA-BYUN Keigo
    Faculty of Health and Sport Science, University of Tsukuba
  • KIZUKA Tomohiro
    Faculty of Health and Sport Science, University of Tsukuba

Bibliographic Information

Other Title
  • パルスハイトコントロールの限界点を用いた瞬発的な力発揮特性の評価

Description

<p>The ability of rapid force development is one of the important factors for improving the physical performance. It has been known that rapid isometric force is controlled by a central motor program to keep the rise time relatively constant independent of force amplitude (pulse height control). The advantage of using pulse height control is to increase rate of force with force amplitude. However, this strategy is thought to be applicable up to about 50-60% of MVC. When the force level increases further, subjects often switch to pulse width control to increase the time to peak force. The purpose of this study was to determine the force level (turning point) at which subjects switch from pulse height control to pulse width control. This turning point was defined as the maximum force produced by pulse height control. We then attempted to examine whether this turning point is different among subjects. Our results showed that a turning point (%MVC) between two strategies was detected in all subjects and the mean values were significantly higher in the sprinter group than that in the control group. Our results suggest that each subject has different limits of force level produced by pulse height control.</p>

Journal

  • Biomechanisms

    Biomechanisms 24 (0), 27-36, 2018

    Society of Biomechanisms

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