Premium
The effect of leg extension training on the mean power frequency of the mechanomyographic signal
Author(s) -
Evetovich Tammy K.,
Housh Terry J.,
Weir Joseph P.,
Housh Dona J.,
Johnson Glen O.,
Ebersole Kyle T.,
Smith Douglas B.
Publication year - 2000
Publication title -
muscle and nerve
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.025
H-Index - 145
eISSN - 1097-4598
pISSN - 0148-639X
DOI - 10.1002/(sici)1097-4598(200006)23:6<973::aid-mus21>3.0.co;2-c
Subject(s) - concentric , medicine , physical medicine and rehabilitation , signal (programming language) , mathematics , physical therapy , computer science , geometry , programming language
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) or 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. © 2000 John Wiley & Sons, Inc. Muscle Nerve 23: 973–975, 2000