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BMC Sports Science, Medicine and Rehabilitation

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Open Access 01-12-2018 | Research article

Investigation of cardiopulmonary exercise testing using a dynamic leg press and comparison with a cycle ergometer

Authors: Farouk Chrif, Tobias Nef, Kenneth J. Hunt

Published in: BMC Sports Science, Medicine and Rehabilitation | Issue 1/2018

Abstract

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.

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Title: Investigation of cardiopulmonary exercise testing using a dynamic leg press and comparison with a cycle ergometer
Authors: Farouk Chrif
Tobias Nef
Kenneth J. Hunt
Publication date: 01-12-2018
Publisher: BioMed Central
Published in: BMC Sports Science, Medicine and Rehabilitation / Issue 1/2018
Electronic ISSN: 2052-1847
DOI: https://doi.org/10.1186/s13102-018-0095-3

Keynote webinar | Spotlight on sleep in brain health

Springer Medicine

Investigation of cardiopulmonary exercise testing using a dynamic leg press and comparison with a cycle ergometer

Abstract

Background

Methods

Results

Conclusions

Keynote webinar | Spotlight on sleep in brain health

Springer Medicine

Abstract

Background

Methods

Results

Conclusions

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