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Muscle fatigue and its relation to lactate accumulation and LDH activity in man.
Swedish School of Sport and Health Sciences, GIH, Department of Sport and Health Sciences, Laboratory for Biomechanics and Motor Control.
1978 (English)In: Acta Physiologica Scandinavica, ISSN 0001-6772, E-ISSN 1365-201X, Vol. 103, no 4, 413-20 p.Article in journal (Refereed) Published
Abstract [en]

The lactate concentration in different muscle fibre types was determined in biopsy specimens from human vastus lateralis muscle after 30 and 60 s of maximal dynamic leg exercise. In addition, muscle fibre type distribution, total lactate dehydrogenase (LDH) activity, and isozymes of LDH were determined. In accordance with previous studies (Thorstensson and Karlsson 1976, Nilsson et al. 1977) it was found that an increasing proportion of slow twitch (ST) fibres corresponded to better sustained muscle force. Lactate was found preferentially in fast twitch (FT) fibres after 30 s, but after 60 s this difference was abolished. Differences between the two main muscle fibre types in muscle lactate, total LDH activity, and M-LDH activity were correlated to muscle fatigue. It was concluded that lactate or associated pH changes primarily in FT fibres could be one factor responsible for the impaired muscle function.

Place, publisher, year, edition, pages
1978. Vol. 103, no 4, 413-20 p.
Identifiers
URN: urn:nbn:se:gih:diva-834PubMedID: 716962OAI: oai:DiVA.org:gih-834DiVA: diva2:174801
Available from: 2009-02-25 Created: 2009-02-24 Last updated: 2011-05-03Bibliographically approved

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