Countermovement Jump Training Is More Effective Than Drop Jump Training in Enhancing Jump Height in Non-professional Female Volleyball Players.

Autor:	Ruffieux J; Department of Neurosciences and Movement Sciences, Université de Fribourg, Fribourg, Switzerland., Wälchli M; Department of Neurosciences and Movement Sciences, Université de Fribourg, Fribourg, Switzerland., Kim KM; Department of Kinesiology and Sport Sciences, University of Miami, Coral Gables, FL, United States., Taube W; Department of Neurosciences and Movement Sciences, Université de Fribourg, Fribourg, Switzerland.
Jazyk:	angličtina
Zdroj:	Frontiers in physiology [Front Physiol] 2020 Mar 17; Vol. 11, pp. 231. Date of Electronic Publication: 2020 Mar 17 (Print Publication: 2020).
DOI:	10.3389/fphys.2020.00231
Abstrakt:	The aim of the present study was to compare the effects of countermovement jump (CMJ) and drop jump (DJ) training on the volleyball-specific jumping ability of non-professional female volleyball players. For that purpose, 26 female volleyball players (15-32 years) were assigned to either a CMJ (20.4 ± 3.1 years, 171.0 ± 3.0 cm) or a DJ training group (22.0 ± 4.4 years, 168.2 ± 5.0 cm), which performed a six-week jump training (two sessions per week, 60 jumps per session). Each group performed 20% of the jumps in the jump type of the other group in order to minimize the influence of enhanced motor coordination on the differences between groups regarding the improvements of jump performance. Before and after the training, jump height was assessed in four jump types, including the trained and volleyball-specific jump types. Although both training forms substantially improved jump height, the CMJ training was significantly more effective in all jump types (17 vs. 7% on average; p < 0.001). This suggests that, at least for non-professional female volleyball players and a training duration of six weeks, training with a high percentage of CMJs is more effective than one with a high percentage of DJs. We hypothesize that this might be related to the slower stretch-shortening cycle during CMJs, which seems to be more specific for these players and tasks. These findings should support volleyball coaches in designing optimal jump trainings. (Copyright © 2020 Ruffieux, Wälchli, Kim and Taube.)
Databáze:	MEDLINE
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