Age effect on jumping techniques and lower limb stiffness during vertical jump
Deutscher übersetzter Titel: | Alterseffekte auf die Sprungtechniken und die Steifheit der unteren Gliedmaßen während des Vertikalsprunges |
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Autor: | Wang, Li-I; Lin, Der-Chia; Huang, Chenfu |
Erschienen in: | Research in sports medicine |
Veröffentlicht: | 12 (2004), 3, S. 209-219, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Gedruckte Ressource Elektronische Ressource (online) |
Sprache: | Englisch |
ISSN: | 1543-8627, 1543-8635 |
DOI: | 10.1080/15438620490497549 |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU200508001933 |
Quelle: | BISp |
Abstract des Autors
The spring-mass system is a reasonable model of the whole phenomenon of musculotendinous stiffness of the lower limbs. This study was to investigate the developmental effect on jumping techniques and lower-limb stiffness during vertical jumping. Nine children and nine adults participated in the study. A Peak high-speed camera was synchronized with a Kistler force plate (600Hz) to collect the biomechanics parameters. Differences between mean values were analyzed by a t-test for independent samples. The present research showed that during downward countermovement, the 18-year-old group produced a larger displacement of ankle, knee, and CG in crouch phase (p<.05) and higher vertical ground reaction forces, whereas the CG was lowest (p<.05), and that the group produced greater leg and joint stiffness (p<.05) to create larger elastic energy generation and storage. For the 6-year-old group, the lower extremity could not be extended completely during push phase. Thus, the lack of prestretch, lower stiffness, and incomplete extension in the 6-year-old group is thought to influence jumping performance. Verf.-Referat