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Adaptive Response i...
Adaptive Response in Human Skeletal Muscle Subjected to Prolonged Eccentric Training
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Fridén, Jan (author)
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- Seger, Jan (author)
- Gymnastik- och idrottshögskolan,Institutionen för idrotts- och hälsovetenskap
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Sjöström, Michael (author)
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- Ekblom, Björn (author)
- Gymnastik- och idrottshögskolan,Björn Ekbloms forskningsgrupp
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(creator_code:org_t)
- 1983
- 1983
- English.
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In: International Journal of Sports Medicine. - 0172-4622 .- 1439-3964. ; :4, s. 177-183
- Related links:
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https://urn.kb.se/re...
Abstract
Subject headings
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- 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.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Odontologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Dentistry (hsv//eng)
Keyword
- Physiology
- Fysiologi
Publication and Content Type
- ref (subject category)
- art (subject category)
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