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Cardiorespiratory and muscle oxygenation responses to low-load/high-repetition resistance exercises in COPD and healthy controls
Institut Universitaire de cardiologie et de pneumologie de Québec, Université Laval, Quebec, Canada.
2018 (English)In: Journal of applied physiology, ISSN 8750-7587, E-ISSN 1522-1601, Vol. 124, no 4, p. 877-887Article in journal (Refereed) Published
Abstract [en]

Apart from single-limb knee extension, cardiorespiratory demand per kilogram work during low-load/high-repetition knee extension and shoulder flexion exercises was higher in patients with COPD than in healthy controls (range 27-122%, P < 0.0125). Δdeoxy-[Hb/Mb] of the quadriceps during knee extension was similar between the two groups, while Δdeoxy-[Hb/Mb] per kilogram work was higher in patients with COPD. We conclude that 1) in patients with COPD, single-limb exercises resulted in lower peak cardiorespiratory demand as well as higher localized workloads compared with two-limb exercises; 2) compared with healthy controls, the cardiorespiratory demand, either expressed per unit of work or relative to peak capacity, was higher in patients with COPD than in controls during low-load/high-repetition resistance exercises, irrespective of the involvement of one or two limbs or of the upper or lower extremity; 3) quadriceps muscle deoxygenation per unit of work during low-load/high-repetition knee extension was increased in COPD compared with controls; and 4) single- and two-limb low-load/high-repetition knee extension and shoulder flexion resistance exercises imposed a similar burden on the cardiorespiratory system, resulting in a higher cardiorespiratory demand per kilogram work performed during shoulder flexion compared with knee extension, in both COPD and healthy controls. NEW & NOTEWORTHY In chronic obstructive pulmonary disease (COPD), single-limb knee extension and shoulder flexion resulted in a lower peak cardiorespiratory response as well as larger localized exercise workloads compared with two-limb exercises. Cardiorespiratory and quadriceps deoxygenation cost per kilogram work was greater in COPD compared with healthy controls, despite similar acute responses. Compared with knee extension, shoulder flexion imposed a similar burden on the cardiorespiratory system in patients with COPD and healthy controls.

Place, publisher, year, edition, pages
American Physiological Society , 2018. Vol. 124, no 4, p. 877-887
Keywords [en]
cardiopulmonary demand, chronic obstructive pulmonary disease, exercise workloads, muscle oxygenation, resistance training
National Category
Physiotherapy
Identifiers
URN: urn:nbn:se:umu:diva-148975DOI: 10.1152/japplphysiol.00447.2017ISI: 000440978100008PubMedID: 29357500OAI: oai:DiVA.org:umu-148975DiVA, id: diva2:1218022
Funder
Swedish Heart Lung Foundation, 20140472Available from: 2018-06-13 Created: 2018-06-13 Last updated: 2018-10-29Bibliographically approved

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Nyberg, Andre

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