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Muscle fibre types ...
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Esbjörnsson, M
(författare)
Muscle fibre types and enzyme activities after training with local leg ischaemia in man.
- Artikel/kapitelEngelska1993
Förlag, utgivningsår, omfång ...
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Wiley,1993
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Nummerbeteckningar
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LIBRIS-ID:oai:DiVA.org:kth-44620
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https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-44620URI
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https://doi.org/10.1111/j.1748-1716.1993.tb09554.xDOI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:ref swepub-contenttype
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Ämneskategori:art swepub-publicationtype
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QC 20111109
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Eight healthy men performed supine one-legged training on a bicycle ergometer 45 min per leg four times per week for 4 week. The ergometer and lower body were inside a pressure chamber, the opening of which was sealed at the level of the crotch. One leg trained with impeded leg blood flow (I-leg), induced by an increased (50 mmHg) chamber pressure, at the highest tolerable intensity. The contralateral leg trained at the same power under normal pressure (N-leg). Before and after training biopsies were taken from the vastus lateralis of both legs and maximal one-legged exercise tests were executed with both legs. Biopsies were repeated when the subjects had been back to their habitual physical activity for 3 months. Training increased exercise time to exhaustion, but more in the I-leg than in the N-leg. After training, the I-leg had higher activity of citrate synthase (CS), a marker of oxidative capacity, and lower activity of the M-subunit of lactate dehydrogenase isoenzymes. It also had a higher percentage of type-I fibres and a lower percentage of IIB fibres, larger areas of all fibre types and a greater number of capillaries per fibre. It is concluded that ischaemic training changes the muscle metabolic profile in a direction facilitating aerobic metabolism. An altered fibre-type composition may contribute, but is not enough prerequisite for the change.
Ämnesord och genrebeteckningar
Biuppslag (personer, institutioner, konferenser, titlar ...)
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Jansson, E
(författare)
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Sundberg, C J
(författare)
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Sylvén, C
(författare)
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Eiken, OlaKarolinska Institutet(Swepub:kth)u1fcwvxl
(författare)
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Nygren, A
(författare)
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Kaijser, L
(författare)
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Karolinska Institutet
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Acta Physiologica Scandinavica: Wiley148:3, s. 233-410001-67721365-201X
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