Muscle fiber characteristics in female dancers during an active and an inactive period
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| Deutscher übersetzter Titel: | Charakteristische Merkmale der Muskelfasern bei Taenzerinnen waehrend einer aktiven und einer inaktiven Phase |
|---|---|
| Autor: | Dahlstroem, M.; Esbjoernsson, M.; Jansson, E.; Kaijser, L. |
| Erschienen in: | International journal of sports medicine |
| Veröffentlicht: | 8 (1987), 2, S. 84-87, Lit. |
| Format: | Literatur (SPOLIT) |
| Publikationstyp: | Zeitschriftenartikel |
| Medienart: | Gedruckte Ressource Elektronische Ressource (online) |
| Sprache: | Englisch |
| ISSN: | 0172-4622, 1439-3964 |
| DOI: | 10.1055/s-2008-1025646 |
| Schlagworte: | |
| Online Zugang: | |
| Erfassungsnummer: | PU198705029683 |
| Quelle: | BISp |
Abstract
Muscle biopsies were taken from female dancers, aged 24+/-2 years, first during an active period and then after 32 weeks of detraining. During the active period, the percentage of type I fibers was 63 +/- 12, and of the subgroups IIA, IIB, and IIC, 26 +/- 9, 8 +/- 7, and 3 +/- 3 respectively. There was no significant change due to detraining either in the proportion of type I fibers or in the type II subgroups. During the active period, the cross-sectional area of the type I fibers was 3798 +/- 586 micro square metre. The areas of the subgroups IIA, IIB, and IIC were 3394 +/858, 2497 +/- 530, and 3296 +/-638 micro square metre, respectively. After the detraining period, the area of the type I fibres had increased significantly. The areas of the types IIA, IIB, and IIC tended to be increased although not significantly. It is suggested that the comparatively high percentage of type I fibers, which was found in the active dancers, is the result of selection rather than of training, while the small fiber areas seem to be due to training. Verf.-Referat