Muscle Oxygenation Responses to Low-intensity Steady Rate Concentric and Eccentric Cycling

Mark Rakobowchuk, Laurie Isacco, Ophélie Ritter, Alicia González Represas, Malika Bouhaddi, Bruno Degano, Nicolas Tordi, Laurent Mourot

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Muscle deoxygenation responses provide information about the training impulse of an exercise session enabling adaptation to be predicted. Our aim was to investigate muscle oxygenation profiles during prolonged low-intensity eccentric and concentric cycling. Twelve healthy men performed two 45-min exercise sessions of concentric (CON) and eccentric (ECC) cycling, matched for the same heart rate at the start of each session. Mechanical power output during ECC was ∼2.5 times that of CON (210±40 W vs. 82±16 W). Oxygen uptake, blood lactate, cardiac output and systolic arterial pressure responses did not differ between exercises. Heart rate was similar at 5 min of each exercise bout but progressively increased during ECC and was higher at 15, 30 and 45 min of ECC compared to CON (+10 bpm), with a trend for a lower stroke volume. Diastolic and mean blood pressures were higher during ECC. No significant differences were observed in muscle oxygenation profiles. Muscle oxygenation responses during prolonged low-intensity exercise were not affected by the type of muscle action at the same metabolic demand and cardiac output.

Original languageEnglish
Pages (from-to)173-180
Number of pages8
JournalInternational Journal of Sports Medicine
Volume39
Issue number3
DOIs
Publication statusPublished - 1 Feb 2018

    Fingerprint

Keywords

  • cardiovascular
  • near infra-red spectroscopy
  • negative muscle work
  • oxygen uptake
  • Tissue saturation index
  • vascular conductance

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine

Cite this

Rakobowchuk, M., Isacco, L., Ritter, O., Represas, A. G., Bouhaddi, M., Degano, B., Tordi, N., & Mourot, L. (2018). Muscle Oxygenation Responses to Low-intensity Steady Rate Concentric and Eccentric Cycling. International Journal of Sports Medicine, 39(3), 173-180. https://doi.org/10.1055/s-0043-121272