Abstract
Prolonged dynamic exercise and sustained isometric contractions induce muscle fatigue, as manifested by decreased performance and a reduction in the maximum voluntary contraction force. Studies with non-invasive measurements in exercising humans show that mechanisms located beyond the sarcolemma are important in the fatigue process. In this review, we describe probable cellular mechanisms underlying fatigue-induced changes in excitation–contraction (E–C) coupling occurring in human muscle fibres during strenuous exercise. We use fatigue-induced changes observed in intact single muscle fibres, where force and cellular Ca2+ handling can be directly measured, to explain changes in E–C coupling observed in human muscle during exercise.
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We thank the Swedish Research Council and the Swedish National Center for Sports Research for funding.
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Communicated by Nigel Taylor.
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Place, N., Yamada, T., Bruton, J.D. et al. Muscle fatigue: from observations in humans to underlying mechanisms studied in intact single muscle fibres. Eur J Appl Physiol 110, 1–15 (2010). https://doi.org/10.1007/s00421-010-1480-0
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DOI: https://doi.org/10.1007/s00421-010-1480-0