title: Mechanomyographic responses are not influenced by the innervation zone for the vastus medialis.
abstract: BACKGROUND
  The purposes of this study were to: (1) compare the power output-related patterns of absolute and normalized mechanomyographic (MMG) amplitude and mean power frequency (MPF) signals across the innervation zone (IZ) during incremental cycle ergometry; and (2) examine the influence of the IZ on the mean MMG amplitude and MPF values.
  
  
  METHODS
  Ten men performed incremental cycle ergometry tests to exhaustion. Surface MMG signals were recorded simultaneously from accelerometer arrangements placed on the vastus medialis over the IZ and proximal and distal to the IZ.
  
  
  RESULTS
  The results of polynomial regression indicate that the best-fit model for each site was consistent for each subject for MMG amplitude, but not for MMG MPF. Two-way analyses of variance (ANOVAs) revealed no site × power output interaction (P > 0.05) for absolute and normalized MMG amplitude and MPF values.
  
  
  CONCLUSIONS
  Our findings demonstrate that the IZ does not influence the MMG signal during dynamic exercise.
authors.affiliation: Integrative Physiology of Exercise Laboratory, Eugene Applebaum College of Pharmacy and Health Sciences, Wayne State University, 259 Mack Avenue, Detroit, Michigan 48201, USA. en7488@wayne.edu
authors.forename: Moh H
authors.initials: MH
authors.lastname: Malek
authors.forename: Jared W
authors.initials: JW
authors.lastname: Coburn
mesh_terms: D000328:Adult; D001696:Biomechanical Phenomena; D015444:Exercise / Q000502:physiology; D005080:Exercise Test; D006801:Humans; D008297:Male; D009119:Muscle Contraction / Q000502:physiology*; D018763:Muscle Fatigue / Q000502:physiology*; D009213:Myography; D010807:Physical Endurance / Q000502:physiology*; D052097:Quadriceps Muscle / Q000033:anatomy & histology / Q000294:innervation* / Q000502:physiology*; D012044:Regression Analysis