Twitch potentiation after voluntary contraction and neuromuscular electrical stimulation at various frequencies in human quadriceps femoris

Naokazu Miyamoto, Atsuki Fukutani, Toshimasa Yanai, Yasuo Kawakami

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Introduction: In this study we aimed to compare the extent of twitch potentiation (TP) after voluntary contraction and percutaneous electrical stimulation of muscles (neuromuscular electrical stimulation: NMES) with various stimulation frequencies at equivalent target levels. Methods: Isometric knee extensions of 10 s were performed at a 40% maximal voluntary contraction level by voluntary or NMES conditioning contractions at 20, 40, and 80 H Z of the quadriceps femoris muscle. Twitch responses were elicited by stimulating the femoral nerve transcutaneously at supramaximal intensity. Results: NMES at 80 HZ induced significantly less TP (128.7 ± 17.1%) than voluntary contraction (156.2 ± 23.1%), whereas no statistical difference was found in TP among voluntary and 20-and 40-H Z NMES conditioning contractions (170.8 ± 21.1% and 162.7 ± 16.9% for 20-and 40-HZ NMES, respectively). Conclusion: Stimulation frequency of NMES determines whether NMES can induce TP comparable to that after voluntary contraction.

Original languageEnglish
Pages (from-to)110-115
Number of pages6
JournalMuscle and Nerve
Volume45
Issue number1
DOIs
Publication statusPublished - 2012 Jan 1

Keywords

  • M-wave
  • Muscle fatigue
  • Postactivation potentiation
  • Stimulation frequency
  • Torque
  • Twitch peak

ASJC Scopus subject areas

  • Physiology
  • Clinical Neurology
  • Cellular and Molecular Neuroscience
  • Physiology (medical)

Fingerprint Dive into the research topics of 'Twitch potentiation after voluntary contraction and neuromuscular electrical stimulation at various frequencies in human quadriceps femoris'. Together they form a unique fingerprint.

  • Cite this