Cardiopulmonary response to exercise in COPD and overweight patients: Relationship between unloaded cycling and maximal oxygen uptake profiles

6Citations
Citations of this article
67Readers
Mendeley users who have this article in their library.

This article is free to access.

Abstract

Cardiopulmonary response to unloaded cycling may be related to higher workloads. This was assessed in male subjects: 18 healthy sedentary subjects (controls), 14 hypoxemic patients with chronic obstructive pulmonary disease (COPD), and 31 overweight individuals (twelve were hypoxemic). They underwent an incremental exercise up to the maximal oxygen uptake (VO2max), preceded by a 2 min unloaded cycling period. Oxygen uptake (VO2), heart rate (HR), minute ventilation (VE), and respiratory frequency (fR) were averaged every 10 s. At the end of unloaded cycling period, HR increase was significantly accentuated in COPD and hypoxemic overweight subjects (resp., +14±2 and +13±1.5 min-1, compared to +7.5±1.5 min-1 in normoxemic overweight subjects and +8±1.8 min-1 in controls). The fR increase was accentuated in all overweight subjects (hypoxemic: +4.5±0.8; normoxemic: +3.9±0.7 min-1) compared to controls (+2.5±0.8 min-1) and COPDs (+2.0±0.7 min-1). The plateau VE increase during unloaded cycling was positively correlated with VE values measured at the ventilatory threshold and VO2max. Measurement of ventilation during unloaded cycling may serve to predict the ventilatory performance of COPD patients and overweight subjects during an exercise rehabilitation program.

Cite

CITATION STYLE

APA

Ba, A., Brégeon, F., Delliaux, S., Cissé, F., Samb, A., & Jammes, Y. (2015). Cardiopulmonary response to exercise in COPD and overweight patients: Relationship between unloaded cycling and maximal oxygen uptake profiles. BioMed Research International, 2015. https://doi.org/10.1155/2015/378469

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free