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Adaptive Response in Human Skeletal Muscle Subjected to Prolonged Eccentric Training
Swedish School of Sport and Health Sciences, GIH, Department of Sport and Health Sciences.
Swedish School of Sport and Health Sciences, GIH, Department of Sport and Health Sciences, Björn Ekblom's research group.ORCID iD: 0000-0002-4030-5437
1983 (English)In: International Journal of Sports Medicine, ISSN 0172-4622, no 4, 177-183 p.Article in journal (Refereed) Published
Abstract [en]

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 28 fibers. An increased number of type 2C fibers was observed. The ultrastructure 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.

Place, publisher, year, edition, pages
1983. no 4, 177-183 p.
National Category
Dentistry
Identifiers
URN: urn:nbn:se:gih:diva-395OAI: oai:DiVA.org:gih-395DiVA: diva2:759
Available from: 2008-06-04 Created: 2008-06-04 Last updated: 2017-03-31Bibliographically approved

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