Functional fatigue decreases 3-dimensional multijoint position reproduction acuity in the overhead-throwing athlete
Deutscher übersetzter Titel: | Funktionelle Ermüdung verringert die Genauigkeit der dreidimensionalen Positionsreproduktion mehrerer Gelenke beim Überkopfwurf-Sportler |
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Autor: | Tripp, Brady L.; Boswell, Lanny; Gansneder, Bruce M.; Shultz, Sandra J. |
Erschienen in: | Journal of athletic training |
Veröffentlicht: | 39 (2004), 4, S. 316-320, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Elektronische Ressource (online) Gedruckte Ressource |
Sprache: | Englisch |
ISSN: | 1062-6050, 0160-8320, 1938-162X |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU201011008927 |
Quelle: | BISp |
Abstract
Objective: To determine the effects of functional fatigue on active multijoint position reproduction in overhead-throwing athletes. Design and Setting: A standard, repeated-measures, randomized-ordered, counterbalanced, 2-period (crossover) design was used. During the first test session, we randomly assigned subjects to either the nonfatigue or fatigue condition. Subjects underwent pretest measurements and then either a functional fatigue protocol or rest period, followed by posttest measurements. After a recovery period, subjects crossed over to the opposing condition for the second testing session. Subjects: Thirteen overhead-throwing athletes competing in National Collegiate Athletic Association Division I or club baseball, with no history of upper extremity or central nervous system disorders, volunteered for this study. Measurements: We measured active multijoint position reproduction accuracy in 3 dimensions using an electromagnetic tracking device. We noted each subject's ability to reproduce 3 positions corresponding with distinct moments of his throwing motion. A variable error score was calculated to compare the locations of the reproduced points with reference to the target point. Results: A significant difference occurred between the pretest and posttest error scores in the fatigue condition. Comparisons between positions indicated that more errors were seen in the arm-cocked position than in the follow-through position under both fatigue and nonfatigue conditions. Conclusions: Functional fatigue decreased joint position sense acuity in overhead-throwing athletes. Our findings using this novel testing measurement method are in agreement with past research, with one exception. The trend toward higher error scores in the arm-cocked position would appear to contradict findings that sensorimotor system acuity increases toward end ranges of motion. Verf.-Referat