title: Improvement of stance control and muscle performance induced by focal muscle vibration in young-elderly women: a randomized controlled trial.
abstract: Filippi GM, Brunetti O, Botti FM, Panichi R, Roscini M, Camerota F, Cesari M, Pettorossi VE. Improvement of stance control and muscle performance induced by focal muscle vibration in young-elderly women: a randomized controlled trial.
  
  
  OBJECTIVE
  To determine the effect of a particular protocol of mechanical vibration, applied focally and repeatedly (repeated muscle vibration [rMV]) on the quadriceps muscles, on stance and lower-extremity muscle power of young-elderly women.
  
  
  METHODS
  Double-blind randomized controlled trial; 3-month follow-up after intervention.
  
  
  METHODS
  Human Physiology Laboratories, University of Perugia, Italy.
  
  
  METHODS
  Sedentary women volunteers (N=60), randomized in 3 groups (mean age +/- SD, 65.3+/-4.2y; range, 60-72).
  
  
  METHODS
  rMV (100Hz, 300-500microm, in three 10-minute sessions a day for 3 consecutive days) was applied to voluntary contracted quadriceps (vibrated and contracted group) and relaxed quadriceps (vibrated and relaxed group). A third group received placebo stimulation (nonvibrated group).
  
  
  METHODS
  Area of sway of the center of pressure, vertical jump height, and leg power.
  
  
  RESULTS
  Twenty-four hours after the end of the complete series of applications, the area of sway of the center of pressure decreased significantly by approximately 20%, vertical jump increased by approximately 55%, and leg power increased by approximately 35%. These effects were maintained for at least 90 days after treatment.
  
  
  CONCLUSIONS
  rMV is a short-lasting and noninvasive protocol that can significantly and persistently improve muscle performance in sedentary young-elderly women.
authors.affiliation: Institute of Human Physiology, Catholic University, Rome. filippi@fastwebnet.it
authors.forename: Guido M
authors.initials: GM
authors.lastname: Filippi
authors.forename: Orazio
authors.initials: O
authors.lastname: Brunetti
authors.forename: Fabio M
authors.initials: FM
authors.lastname: Botti
authors.forename: Roberto
authors.initials: R
authors.lastname: Panichi
authors.forename: Mauro
authors.initials: M
authors.lastname: Roscini
authors.forename: Filippo
authors.initials: F
authors.lastname: Camerota
authors.forename: Matteo
authors.initials: M
authors.lastname: Cesari
authors.forename: Vito E
authors.initials: VE
authors.lastname: Pettorossi
mesh_terms: D000368:Aged; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D035002:Lower Extremity / Q000502:physiology*; D008875:Middle Aged; D009068:Movement / Q000502:physiology; D053580:Muscle Strength / Q000502:physiology*; D018482:Muscle, Skeletal / Q000502:physiology; D004856:Postural Balance / Q000502:physiology*; D057185:Sedentary Behavior; D014732:Vibration