Int J Sports Med 2018; 39(03): 173-180
DOI: 10.1055/s-0043-121272
Physiology & Biochemistry
© Georg Thieme Verlag KG Stuttgart · New York

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

Mark Rakobowchuk
1  Department of Biological Sciences, Thompson Rivers University Faculty of Science, Kamloops, Canada
,
Laurie Isacco
2  Prognostic markers and regulatory factors of cardiovascular diseases and Exercise Performance, Univ. of Bourgogne Franche-Comté, Health, Innovation platform, Besançon, France
,
Ophélie Ritter
3  PEPITE and Exercise Performance Health Innovation Platform, Univ. of Bourgogne Franche-Comté, Besançon, France
,
Alicia González Represas
4  Department Functional Biology and Health Sciences, Univ. of Vigo, Vigo, Spain
,
Malika Bouhaddi
5  Prognostic markers and regulatory factors of cardiovascular diseases, Univ. of Bourgogne Franche-Comté, Besançon, France
,
Bruno Degano
5  Prognostic markers and regulatory factors of cardiovascular diseases, Univ. of Bourgogne Franche-Comté, Besançon, France
,
Nicolas Tordi
3  PEPITE and Exercise Performance Health Innovation Platform, Univ. of Bourgogne Franche-Comté, Besançon, France
,
Laurent Mourot
6  Research Unit EA3920 Prognostic Markers and Regulatory Factors of Cardiovascular Diseases and Exercise Performance, Exercise Performance Health, Innovation Platform, Univ. Bourgogne Franche-Comté, Besançon, France and Tomsk Polytechnic University, Tomsk, Russia
› Author Affiliations
Further Information

Publication History



accepted after revision 10 February 2017

Publication Date:
24 January 2018 (eFirst)

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.