title: Effect of Whole-Body-Vibration Training on Trunk-Muscle Strength and Physical Performance in Healthy Adults: Preliminary Results of a Randomized Controlled Trial.
abstract: BACKGROUND
  Whole-body-vibration (WBV) stimulus equipment has been used as a new training method for health promotion. Its use in the clinic has expanded to the field of sports and rehabilitation for disabled patients. WBV training is rapidly gaining popularity in health and fitness centers as an alternative method for improving muscle performance. Acute positive effects of WBV have been shown on lower-extremity muscle power and vertical-jump ability; however, there have not been any studies focusing on the long-term effects of WBV for trunk muscle and dynamic balance.
  
  
  OBJECTIVE
  To investigate the effects of an 8-wk program of WBV in combination with trunk-muscle training on muscle performance in healthy, untrained adults.
  
  
  METHODS
  Laboratory-based, repeated-measures study.
  
  
  METHODS
  University laboratory.
  
  
  METHODS
  20 healthy university men.
  
  
  METHODS
  Participants were randomly assigned to a WBV or non-WBV group. The WBV group performed a trunk-muscle-training program in combination with WBV; the non-WBV group performed the same muscle-training program without WBV for 8 wk.
  
  
  METHODS
  In the pre- and posttraining period, the participants were evaluated using the Functional Movement Screen (FMS), Y Balance Test (Y-test) (anterior, posteromedial, and posterolateral reach), trunk-muscle isometric strength (flexor, extensor, and flexor:extensor ratio), squat jump, and countermovement jump.
  
  
  RESULTS
  The WBV group had greater improvement than the non-WBV group in both trunk-flexor muscle strength (P = .02) and the Y-test (anterior reach) (P = .004) between pre- and posttraining.
  
  
  CONCLUSIONS
  Adding WBV to a trunk-muscle-strengthening program may improve trunk-flexor isometric strength and anterior reach during the Y-test more than training without WBV. The WBV protocol used in this study had no significant impact on FMS scores, squat jumping, countermovement jumping, trunk-extensor isometric strength, or trunk flexor:extensor ratio.
authors.forename: Noriaki
authors.initials: N
authors.lastname: Maeda
authors.forename: Yukio
authors.initials: Y
authors.lastname: Urabe
authors.forename: Junpei
authors.initials: J
authors.lastname: Sasadai
authors.forename: Akira
authors.initials: A
authors.lastname: Miyamoto
authors.forename: Masahito
authors.initials: M
authors.lastname: Murakami
authors.forename: Junichi
authors.initials: J
authors.lastname: Kato
mesh_terms: D000328:Adult; D054874:Athletic Performance / Q000502:physiology*; D015444:Exercise / Q000502:physiology*; D064368:Healthy Volunteers; D006801:Humans; D008297:Male; D053580:Muscle Strength / Q000502:physiology*; D018482:Muscle, Skeletal / Q000502:physiology*; D004856:Postural Balance; D060726:Torso / Q000502:physiology*; D014732:Vibration
keywords: dynamic balance; trunk-muscle training