Chrif, Farouk; Nef, Tobias; Hunt, Kenneth J. (2018). Investigation of cardiopulmonary exercise testing using a dynamic leg press and comparison with a cycle ergometer. BMC sports science, medicine & rehabilitation, 10(5), pp. 1-11. BioMed Central 10.1186/s13102-018-0095-3
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Chrif_et_al_CPET.pdf - Published Version Available under License Creative Commons: Attribution (CC-BY). Download (1MB) | Preview |
Background: Leg-press machines are widely employed for musculoskeletal conditioning of the lower-limbs and they provide cardiovascular benefits for resistance training in cardiac patients. The aim of this study was to assess the feasibility of a dynamic leg press (DLP) for incremental cardiopulmonary exercise testing (CPET) and to compare the results with those obtained using a cycle ergometer (CE).
Methods: Twelve healthy participants aged 27 ± 4 years (mean ± standard deviation) performed incremental cardiopulmonary exercise tests on a DLP and on a CE. To facilitate CPET, the DLP was augmented with force and angle sensors, a work rate estimation algorithm, and a visual feedback system. Gas exchange variables and heart rate were
recorded breath-by-breath using a cardiopulmonary monitoring system.
Results: Peak oxygen uptake and peak heart rate were significantly lower for the DLP than for the CE: peak oxygen uptake was 3.2 ± 0.5 vs. 4.1 ± 0.5 L/min (DLP vs. CE, p = 6.7 × 10−6); peak heart rate was 174 ± 14 vs. 182 ± 13 bpm (DLP vs. CE, p = 0.0016). Likewise, the sub-maximal cardiopulmonary parameters, viz. the first and second ventilatory thresholds, and ramp duration were significantly lower for the DLP.
Conclusions: The dynamic leg press was found to be feasible for CPET: the approach was technically implementable and all peak and sub-maximal cardiopulmonary parameters were able to be identified. The lower outcome values observed with the DLP can be attributed to a peripheral factor, namely the earlier onset of muscular fatigue.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
10 Strategic Research Centers > ARTORG Center for Biomedical Engineering Research > ARTORG Center - Gerontechnology and Rehabilitation 10 Strategic Research Centers > ARTORG Center for Biomedical Engineering Research |
Graduate School: |
Graduate School for Cellular and Biomedical Sciences (GCB) |
UniBE Contributor: |
Chrif, Farouk, Nef, Tobias |
Subjects: |
600 Technology > 610 Medicine & health |
ISSN: |
2052-1847 |
Publisher: |
BioMed Central |
Language: |
English |
Submitter: |
Farouk Chrif |
Date Deposited: |
18 Apr 2018 11:22 |
Last Modified: |
05 Dec 2022 15:11 |
Publisher DOI: |
10.1186/s13102-018-0095-3 |
PubMed ID: |
29468072 |
BORIS DOI: |
10.7892/boris.113103 |
URI: |
https://boris.unibe.ch/id/eprint/113103 |
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