TY  - JOUR
A1  - Prieske, Olaf
A1  - Chaabene, Helmi
A1  - Puta, Christian
A1  - Behm, David George
A1  - Büsch, Dirk
A1  - Granacher, Urs
T1  - Effects of Drop Height on Jump Performance in Male and Female Elite Adolescent Handball Players
T2  - International journal of sports physiology and performance
N2  - Purpose: To examine the effects of drop height on drop-jump (DJ) performance and on associations between DJ and horizontal-jump/sprint performances in adolescent athletes. Methods: Male (n = 119, 2.5 [0.6] y post-peak-height velocity) and female (n = 120, 2.5 [0.5] y post-peak-height velocity) adolescent handball players (national level) performed DJs in randomized order using 3 drop heights (20, 35, and 50 cm). DJ performance (jump height, reactive strength index [RSI]) was analyzed using the Optojump Next system. In addition, correlations were computed between DJ height and RSI with standing-long-jump and 20-m linear-sprint performances. Results: Statistical analyses revealed medium-size main effects of drop height for DJ height and RSI (P <.001, 0.63 <= d <= 0.71). Post hoc tests indicated larger DJ heights from 20 to 35 and 35 to 50 cm (P <=.031, 0.33 <= d <= 0.71) and better RSI from 20- to 35-cm drop height (P <.001, d = 0.77). No significant difference was found for RSI between 35- and 50-cm drop height. Irrespective of drop height, associations of DJ height and RSI were small with 5-m-split time (-.27 <= r <=.05), medium with 10-m-split time (-.44 <= r <=.14), and medium to large with 20-m sprint time and standing-long-jump distance (-.57 <= r <=.22). Conclusions: The present findings indicate that, irrespective of sex, 35-cm drop heights are best suited to induce rapid and powerful DJ performance (ie, RSI) during reactive strength training in elite adolescent handball players. Moreover, training-related gains in DJ performance may at least partly translate to gains in horizontal jump and longer sprint distances (ie, >= 20-m) and/or vice versa in male and female elite adolescent athletes, irrespective of drop height.
KW  - stretch-shortening cycle
KW  - plyometric training
KW  - strength training
KW  - tendon stiffness
KW  - young athletes
Y1  - 2019
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/49664
SN  - 1555-0265
SN  - 1555-0273
VL  - 14
IS  - 5
SP  - 674
EP  - 680
PB  - Human Kinetics Publ.
CY  - Champaign
ER  -