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Adaptive Response in Human Skeletal Muscle Subjected to Prolonged Eccentric Training
Gymnastik- och idrottshögskolan, GIH, Institutionen för idrotts- och hälsovetenskap.
Gymnastik- och idrottshögskolan, GIH, Institutionen för idrotts- och hälsovetenskap, Björn Ekbloms forskningsgrupp.ORCID-id: 0000-0002-4030-5437
1983 (Engelska)Ingår i: International Journal of Sports Medicine, ISSN 0172-4622, E-ISSN 1439-3964, nr 4, s. 177-183Artikel i tidskrift (Refereegranskat) 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.

Ort, förlag, år, upplaga, sidor
1983. nr 4, s. 177-183
Nationell ämneskategori
Odontologi
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URN: urn:nbn:se:gih:diva-395OAI: oai:DiVA.org:gih-395DiVA, id: diva2:759
Tillgänglig från: 2008-06-04 Skapad: 2008-06-04 Senast uppdaterad: 2017-12-05Bibliografiskt granskad

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