title: Examination of a neural cross-over effect using resting mechanomyographic mean frequency from the vastus lateralis muscle in different resting positions following aerobic exercise.
abstract: OBJECTIVE
  To evaluate the potential neural cross-over effect between the vastus lateralis muscles in different postural resting positions.
  
  
  METHODS
  Subjects exercised on an upright cycle ergometer, using only their dominate leg, for 2 min at 30 % VO2 peak. Following this warm-up, subjects then cycled (still using only their dominant leg) for 30 min at 60 % VO2 peak. After the aerobic phase, subjects cooled down (again, using only their dominant leg) for 2 min at 30 % VO2 peak. Resting mechanomyography mean frequency was measured prior to and following aerobic exercise.
  
  
  RESULTS
  There was an approximate 6.3 ± 6.8 and a 10 ± 5.1 % increase (upright sitting position with the subject's knee joint angle fixed at 180°); an approximate 7 ± 6.6 and a 16.1 ± 6.5 % increase (upright sitting position with the subject's knee joint angle fixed at 90°); an approximate 0.5 ± 6.8 and 3.7 ± 5.6 % increase (lying supine position with the subject's knee joint angle fixed at 180°); and an approximately 2 ± 8.3 and 2.5 ± 8.6 % increase (lying supine position with the subject's knee joint angle fixed at 90°) in normalized mechanomyography mean frequency after aerobic exercise for the dominant and non-dominate vastus lateralis muscles, respectfully.
  
  
  CONCLUSIONS
  There appears to be a statistically significant neural cross-over effect for the vastus lateralis muscle, during three of the four postural resting positions, with the non-dominant vastus lateralis muscle having a greater increase in mechanomyography mean frequency.
authors.affiliation: Department of Health and Exercise Science, University of Oklahoma, 1401 Asp Avenue, Room 104, Norman, OK, 73019, USA. Nathan.P.Wages-1@ou.edu.
authors.forename: Nathan P
authors.initials: NP
authors.lastname: Wages
authors.affiliation: Department of Health and Exercise Science, University of Oklahoma, 1401 Asp Avenue, Room 104, Norman, OK, 73019, USA.
authors.forename: Travis W
authors.initials: TW
authors.lastname: Beck
authors.affiliation: Department of Health and Exercise Science, University of Oklahoma, 1401 Asp Avenue, Room 104, Norman, OK, 73019, USA.
authors.forename: Xin
authors.initials: X
authors.lastname: Ye
authors.affiliation: Department of Health and Exercise Science, University of Oklahoma, 1401 Asp Avenue, Room 104, Norman, OK, 73019, USA.
authors.forename: Joshua C
authors.initials: JC
authors.lastname: Carr
mesh_terms: D000328:Adult; D004576:Electromyography / Q000379:methods; D015444:Exercise / Q000502:physiology*; D006801:Humans; D007719:Knee Joint / Q000502:physiology; D008297:Male; D018482:Muscle, Skeletal / Q000502:physiology*; D012146:Rest / Q000502:physiology*; D055815:Young Adult
keywords: Aerobic exercise; Cross-education; Cross-over; Mechanomyography; Relaxation