Can a high-intensity contraction be enhanced bya conditioning contraction? insight from the relationship between shortening velocity of muscle fibers and postactivation potentiation

Atsuki Fukutani, Yasuo Kawakami

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

The magnitude of twitch torque increases after a high-intensity contraction of the same muscle (conditioning contraction). This phenomenon is called postactivationpotentiation (PAP). Recently, it has been shown that the maximal voluntary concentric torque or power attained during the maximal voluntary concentric contraction can be increased by a conditioning contraction, suggesting that conditioning contractions are effective on not only twitch but also on maximal voluntary contractions. In contrast, some studies have reported that a conditioning contraction had no potentiation effect on subsequent electrically-evoked maximal isometric force. This discrepancy among previous studies may be attributable to differences in the mode of contraction (i.e., isometric, concentric or eccentric), which can affect the extent of PAP. Therefore, the main purpose of this study was to examine the influence of these aforementioned factors on the extent of PAP, and to discuss the applications of a conditioning contraction to high-intensity contractions.

Original languageEnglish
Title of host publicationSports Performance
PublisherSpringer Japan
Pages199-211
Number of pages13
ISBN (Electronic)9784431553151
ISBN (Print)9784431553144
DOIs
Publication statusPublished - 2015 Jan 1

Keywords

  • Actin-myosin interaction
  • Caconcentration
  • Firing frequency
  • Myosin regulatory light chain phosphorylation

ASJC Scopus subject areas

  • Medicine(all)
  • Engineering(all)
  • Social Sciences(all)

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