Yo-Yo intermittent recovery level 2 test performance and leg muscle growth in a six-month period among pubescent soccer players at different stages of maturity
Deutscher übersetzter Titel: | Die Leistung beim Yo-Yo Intermittent Recovery Test Level 2 und Muskelwachstum im Bein während einer 6-monatigen Trainingsperiode bei Fußballspielern in der Pubertät in unterschiedlichen Entwicklungsstufen |
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Autor: | Chumank, Kentaro; Hoshikawa, Yoshihiro; Iida, Tomomi; Nishijima, Takahiko |
Erschienen in: | International journal of sport and health science |
Veröffentlicht: | 9 (2011), S. 105-112, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Elektronische Ressource (online) Gedruckte Ressource |
Sprache: | Englisch |
ISSN: | 1880-4012, 0915-3942, 1348-1509 |
DOI: | 10.5432/ijshs.201117 |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU201405004589 |
Quelle: | BISp |
Abstract
This study examined the relationships between longitudinal changes in data obtained in the Yo-Yo intermittent recovery level 2 test (Yo-Yo IR2), maximal oxygen consumption (VO2max) and leg muscle size and function in pubescent soccer players. Forty-four soccer players with a mean age of 12.8±0.2 years participated, and were classified into three maturational groups (Late, Average and Early) according to their peak height velocity age. The Yo-Yo IR2 and five-jump tests along with measurement of VO2max and thigh muscle volume were conducted on two occasions 6 months apart. Performances in the Yo-Yo IR2 for the Late, Average and Early groups were 311±61, 371±88 and 411±72 meters at the first measurement, and 389±73, 509±117 and 621±69 meters 6 months later. Consequently, two-way repeated-measures ANOVA revealed a significant interaction whereby the improvement in Yo-Yo IR2 performance was larger in the Early group (51.3%) than in the Late group (24.8%). Greater increases of thigh muscle volume and the result of the five-jump test were found in the Early group, and these were correlated significantly (r=0.52, p<0.05; r=0.39, p<0.05) with improvement of Yo-Yo IR2 performance. In contrast, there was no relationship (r=−0.02, n.s.) between the increments of VO2max and Yo-Yo IR2 performance. These results suggest that performance in the Yo-Yo IR2 is affected by maturity to a great extent, early-maturing players having an advantage in terms of leg muscle development. Verf.-Referat