title: Acute effects of loaded whole body vibration training on performance.
abstract: BACKGROUND
  The application of whole body vibration (WBV) as a warm-up scheme has been receiving an increasing interest among practitioners.
  
  
  OBJECTIVE
  The aim of this study was to determine the effect of loaded and unloaded WBV on countermovement jump, speed and agility.
  
  
  METHODS
  Twenty-one healthy male college football players (age: 20.14 ± 1.65 years; body height: 179.9 ± 8.34 cm; body mass: 74.4 ± 13.0 kg; % body fat: 9.45 ± 4.8) underwent randomized controlled trials that involved standing in a half squat position (ST), ST with 30% of bodyweight (ST + 30%), whole body vibration at f = 50 Hz, A = 4 mm (WBV), and WBV with 30% bodyweight (WBV + 30% BW) after a standardized warm-up. Post measures of countermovement jump, 15-m sprint, and modified t-test were utilized for analyses.
  
  
  RESULTS
  One way repeated measures ANOVA revealed a significant difference in the countermovement jump performance, F (3, 60 = 9.06, η2 = 2.21, P = 0.000. Post-hoc showed that WBV + 30% BW posted significant difference compared to (P = 0.008), ST + 30% BW (P = 0.000) and WBV (P = 0.000). There was also a significant difference in the sprint times among interventions, F (3, 60) = 23.0, η2 = 0.865, P = 0.000. Post hoc showed that WBV + 30% BW displayed significantly lower time values than ST (P = 0.000), ST + 30% BW (P = 0.000) and WBV (P = 0.000). Lastly, there was a significant difference in the agility performance across experimental conditions at F(2.01, 40.1) = 21.0, η2 = 0.954, P = 0.000. Post hoc demonstrated that WBV have lower times than ST (P = 0.013). Also, WBV + 30% BW posted lower times compared to ST (P = 0.000), ST + 30% (P = 0.000) and WBV (P = 0.003).
  
  
  CONCLUSIONS
  Additional external load of 30% bodyweight under WBV posted superior gains in countermovement jump, speed and agility compared to unloaded WBV, loaded non-WBV and unloaded non-WBV interventions.
authors.affiliation: Department of Physical Education and Sport, Tuzla University, Tuzla, Bosnia and Herzegovina ; Center for Sports Excellence, Tuzla, Bosnia and Herzegovina.
authors.forename: Haris
authors.initials: H
authors.lastname: Pojskic
authors.affiliation: College of Human Kinetics, University of the Philippines - Diliman, Quezon, Philippines.
authors.forename: Jeffrey
authors.initials: J
authors.lastname: Pagaduan
authors.affiliation: Department of Physical Education and Sport, Tuzla University, Tuzla, Bosnia and Herzegovina ; Center for Sports Excellence, Tuzla, Bosnia and Herzegovina.
authors.forename: Edin
authors.initials: E
authors.lastname: Uzicanin
authors.affiliation: Department of Physical Education and Sport, Tuzla University, Tuzla, Bosnia and Herzegovina ; Center for Sports Excellence, Tuzla, Bosnia and Herzegovina.
authors.forename: Fuad
authors.initials: F
authors.lastname: Babajic
authors.affiliation: Department of Physical Education and Sport, Tuzla University, Tuzla, Bosnia and Herzegovina ; Center for Sports Excellence, Tuzla, Bosnia and Herzegovina.
authors.forename: Melika
authors.initials: M
authors.lastname: Muratovic
authors.affiliation: Faculty of Kinesiology, University of Split, Split, Croatia.
authors.forename: Mario
authors.initials: M
authors.lastname: Tomljanovic
keywords: Athletic Performance; Exercise; Football; Warm-Up Exercise