Changes in human muscle oxygen saturation and mean fiber conduction velocity during intense dynamic exercise—effect of muscular training status

Authors

  • Anders Kilen MSc,

    1. Department of Exercise and Sport Sciences, University of Copenhagen, Universitetsparken 13, 2100 Copenhagen, Denmark
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  • Leonardo Gizzi MSc, PhD,

    1. Dipartimento di Scienze del Movimento Umano e della Salute, Università degli studi di Roma “Foro Italico”, Roma, Italy
    2. Department of Neurorehabilitation Engineering, Bernstein Center for Computational Neuroscience, University Medical Center Göttingen, Georg-August University, Göttingen, Germany
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  • Bente Rona Jensen MSc, PhD,

    1. Department of Exercise and Sport Sciences, University of Copenhagen, Universitetsparken 13, 2100 Copenhagen, Denmark
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  • Dario Farina MSc,

    1. Department of Neurorehabilitation Engineering, Bernstein Center for Computational Neuroscience, University Medical Center Göttingen, Georg-August University, Göttingen, Germany
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  • Nikolai Baastrup Nordsborg MSc, PhD

    Corresponding author
    1. Department of Exercise and Sport Sciences, University of Copenhagen, Universitetsparken 13, 2100 Copenhagen, Denmark
    • Department of Exercise and Sport Sciences, University of Copenhagen, Universitetsparken 13, 2100 Copenhagen, Denmark, Denmark
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Abstract

Introduction: In this study we investigated whether an association exists between muscle fiber conduction velocity (MFCV) and local muscle oxygen saturation (StO2) in the superficial part of the latissimus dorsi muscle of runners and swimmers during exhaustive dynamic exercise. Methods: Participants performed arm cranking with increasing intensity until exhaustion. Results: Runners' MFCV was unchanged with increasing arm-cranking exercise intensity, but was higher (P < 0.05) than swimmers' MFCV at the same workload. Swimmers' MFCV increased (P < 0.05) with increasing exercise intensity and reached values at exhaustion similar to those of the runners. StO2 was similar in swimmers and runners at rest and decreased with increasing exercise intensity. StO2 was higher (P < 0.05) at the same workload in swimmers compared with runners. StO2 and MFCV were significantly but very weakly correlated in both swimmers and runners. Conclusion: No association exists between surface MFCV and StO2 in either trained or untrained human skeletal muscle during exhaustive intense dynamic exercise. Muscle Nerve, 2012

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