Characteristics of leg extensor muscle in a world champion masters jumper
Deutscher übersetzter Titel: | Charakteristische Merkmale der Beinstreckmuskulatur bei einem Weitsprungweltmeister der Seniorenklasse |
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Autor: | Iwaoka, K.; Funato, K.; Takatoh, S.; Mutoh, Y.; Miyashita, M. |
Erschienen in: | The Journal of sports medicine and physical fitness |
Veröffentlicht: | 29 (1989), 4, S. 394-397, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Gedruckte Ressource |
Sprache: | Englisch |
ISSN: | 0022-4707, 1827-1928 |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU199006043746 |
Quelle: | BISp |
Abstract
To examine the characteristics of a world champion masters jumper (aged 71 yr), a study was undertaken which included a muscle biopsy and measurement of mechanical force production. Comparisons were made to biopsy data obtained from the literature and to force data on 7 active males (63-81 yrs). Cross-sectional areas of vastus lateralis muscle of the jumpers dominant thigh were 3.43 (type I), 3.32 (type IIA) and 2.34 (type IIB) micro-square meter per 1000. This is smaller than what is reported from sedentary young and old. The torque-time curve of maximal isometric knee extension indicates that the jumper had the highest value per body weight from the onset to the peak (3.48 Nm/kg; 58.2 higher than age-matched controls). These results suggest that the daily training of the jumper has a specific effect on the rate of force production despite his relatively small muscle fiber areas. Verf.-Referat