@article{VoelzkeStutzigThorhaueretal.2012,
  author    = {Voelzke, Mathias and Stutzig, Norman and Thorhauer, Hans-Alexander and Granacher, Urs},
  title     = {Promoting lower extremity strength in elite volleyball players: Effects of two combined training methods},
  series = {JOURNAL OF SCIENCE AND MEDICINE IN SPORT},
  volume    = {15},
  journal   = {JOURNAL OF SCIENCE AND MEDICINE IN SPORT},
  number    = {5},
  publisher = {ELSEVIER SCI LTD},
  address   = {OXFORD},
  issn      = {1440-2440},
  doi       = {10.1016/j.jsams.2012.02.004},
  pages     = {457 -- 462},
  year      = {2012},
  abstract  = {Objectives: To compare the impact of short term training with resistance plus plyometric training (RT+P) or electromyostimulation plus plyometric training (EMS+P) on explosive force production in elite volleyball players. Design: Sixteen elite volleyball players of the first German division participated in a training study. Methods: The participants were randomly assigned to either the RT+P training group (n = 8) or the EMS+P training group (n= 8). Both groups participated in a 5-week lower extremity exercise program. Pre and post tests included squat jumps (Si), countermovement jumps (CMJ), and drop jumps (DJ) on a force plate. The three-step reach height (RH) was assessed using a custom-made vertec apparatus. Fifteen m straight and lateral sprint (S15s and S15l) were assessed using photoelectric cells with interims at 5 m and 10 m. Results: RT+P training resulted in significant improvements in Si (+2.3\%) and RH (+0.4\%) performance. The EMS+P training group showed significant increases in performance of CMJ (+3.8\%), DJ (+6.4\%), RH (+1.6\%), S15l (-3.8\%) and after 5 m and 10 m of the S15s (-2.6\%; -0.5\%). The comparison of training-induced changes between the two intervention groups revealed significant differences for the Si (p = 0.023) in favor of RT+P and for the S15s after 5 m (p = 0.006) in favor of EMS+P. Conclusions: The results indicate that RT+P training is effective in promoting jump performances and EMS+P training increases jump, speed and agility performances of elite volleyball players. (c) 2012 Sports Medicine Australia. Published by Elsevier Ltd. All rights reserved.},
  language  = {en}
}