Manipulation of rest period length induces different causes of fatigue in vertical jumping
Deutscher übersetzter Titel: | Die Veränderung der Pausenlänge induziert verschiedene Ermüdungszustände nach Vertikalsprüngen |
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Autor: | Pereira, G.; Morse, C.; Ugrinowitsch, C.; Rodacki, A.; Kokubun, E.; Fowler, N. |
Erschienen in: | International journal of sports medicine |
Veröffentlicht: | 30 (2009), 5, S. 325-330, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Gedruckte Ressource Elektronische Ressource (online) |
Sprache: | Englisch |
ISSN: | 0172-4622, 1439-3964 |
DOI: | 10.1055/s-0029-1202260 |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU200907003376 |
Quelle: | BISp |
Abstract
The aim of this study was to directly compare the causes of fatigue after a short- and a long-rest interval between consecutive stretch-shortening cycle exercises. Eleven healthy males jumped with different resting period lengths (short=6.1 +/- 1 s, long=8.6 +/- 0.9 s), performing countermovement jumps at 95% of their maximal jump height until they were unable to sustain the target height. After short- and long-rest, the maximal voluntary isometric contraction knee extension torque decreased (−7%; p=0.04), comparing to values obtained before exercise protocols. No change was seen from pre- to post-exercise, for either short- or long-rest, in biceps femoris coactivation (−1%; p=0.95), peak-to-peak amplitude (1%; p=0.95) and duration (−8%; p=0.92) of the compound muscle action potential of the vastus lateralis. Evoked peak twitch torque reduced after both exercise protocols (short=−26%, long=−32%; p=0.003) indicating peripheral fatigue. However, central fatigue occurred only after short-rest evidenced by a reduction in voluntary activation of the quadriceps muscle (−14%; p=0.013) measured using the interpolated twitch technique. In conclusion, after stretch-shortening cycle exercise using short rest period length, the cause of fatigue was central and peripheral, while after using long rest period length, the cause of fatigue was peripheral. Verf.-Referat