View Full Version : SUMMARY - EMG frequency during different contraction types and i

12-16-1999, 07:03 AM
We posted an enquiry (11-11-99) regarding EMG frequency content
during different contraction types and intensities. The original
posting and a summary of replies are shown here. Thanks to all who


A question for electromyographers:

We recently measured mean power frequency (MPF) from the surface EMG
signal during eccentric and concentric isokinetic contractions of the
quadriceps at 25%, 50%, 75% and 100% MVC. MPF (measured between 30
deg. and 60 deg. knee extension) was 9% to 19% higher during eccentric
compared with concentric contractions (p