The effect of leg extension training on the mean power frequency of the mechanomyographic signal

Tammy K. Evetovich, Terry J. Housh, Joseph P. Weir, Dona J. Housh, Glen O. Johnson, Kyle T. Ebersole, Douglas B. Smith

Research output: Contribution to journalArticle

15 Scopus citations

Abstract

The purpose of the present investigation was to examine the effect of concentric isokinetic leg extension training on the mean power frequency (MPF) of the mechanomyographic (MMG) signal. Twenty-one men were assigned into a training (TRN; n = 12) of control (CTL; n = 9) group. The TRN group performed six sets of leg extensions 3 days per week for 12 weeks at a velocity of 90°/s. All subjects were tested every 4 weeks for peak torque (PT), while MMG was recorded from the vastus lateralis. PT increased, but there was no significant (P > 0.05) change in the MMG MPF over the 12-week training period. These results indicate that MMG MPF, measured from the vastus lateralis, was not sensitive to training-induced increases in leg- extension strength, possibly due to competing influences of hypertrophy on the MMG signal and/or training-induced adaptations in muscles other than the vastus lateralis. (C) 2000 John Wiley and Sons, Inc.

Original languageEnglish (US)
Pages (from-to)973-975
Number of pages3
JournalMuscle and Nerve
Volume23
Issue number6
DOIs
StatePublished - Jun 26 2000

Keywords

  • Concentric
  • Isokinetic
  • Mean power frequency
  • Mechanomyography

ASJC Scopus subject areas

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

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