Adaptive response in human skeletal muscle subjected to prolonged eccentric training
Deutscher übersetzter Titel: | Anpassungsvorgaenge im menschlichen Skelettmuskel nach langdauerndem exzentrischen Muskeltraining |
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Autor: | Friden, J.; Seger, J.; Sjoestroem, M.; Ekblom, B. |
Erschienen in: | International journal of sports medicine |
Veröffentlicht: | 4 (1983), 3, S. 177-183, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Gedruckte Ressource Elektronische Ressource (online) |
Sprache: | Englisch |
ISSN: | 0172-4622, 1439-3964 |
DOI: | 10.1055/s-2008-1026031 |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU198306019515 |
Quelle: | BISp |
Abstract
The peripheral adaptation process associated with repeating eccentric training over a longer period of time was studied in m. vastus lateralis of eleven healthy males aged 24 +/- 4 years. The maximal dynamic concentric muscle strength was only slightly improved after 8 weeks of training. However, eccentric work capacity was dramatically increased (375 ). A maximal eccentric stint immediately after fulfilled 8 weeks of training caused a selective glycogen depletion from the type 2B fibers. An increased number of type 2C fibers was observed. The ultrastructural analysis showed an essentially well-preserved fine structure. Volume density of mitochondria was somewhat higher in all fiber types after training. Z-band widths were not affected by eccentric training. It is concluded that skeletal musculature adapts itself in a functional manner to the extreme tension demands put on them. Improved coordination and reorganization of the contractile apparatus of muscle fibers are the determining mechanisms of this adaptation. Verf.-Referat