Oxygen uptake kinetics in older patients receiving postacute cardiac rehabilitation: effects of low-intensity aerobic training.

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Abstract

Older patients who receive postacute cardiac rehabilitation improve their physical performance in terms of distance walked at the 6-min walk test. However, the slower and more complicated recovery, along with age-related chronic comorbidities, remarkably limits the intensity of aerobic training, which actually represents the core of cardiac rehabilitation. The aim of this study was to verify whether postacute cardiac rehabilitation also improves the cardiovascular adjustment to exercise, despite low-intensity aerobic training. Using a portable gas analyzer, we assessed the O(2) uptake kinetics during the 6-min walk test at the beginning and at the end of the rehabilitation in 84 patients aged 65 yrs and above. All patients significantly improved the distance walked at the 6-min walk test. The comparison of the time constants of O(2) uptake kinetics showed that 40% of patients also significantly improved the hemodynamic response to exercise. This improvement was independently associated with the report of sedentary lifestyle or low-intensity physical activity in the year before surgery and with longer time constants before physical training. Low-intensity aerobic training improves the cardiovascular adjustment to exercise selectively in patients with physical deconditioning. This confirms the notion that elderly frail patients are those who benefit most from cardiac rehabilitation.

Original languageEnglish
Pages (from-to)953-960
Number of pages8
JournalAmerican Journal of Physical Medicine and Rehabilitation
Volume89
Issue number12
Publication statusPublished - Dec 2010

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Oxygen
Exercise
Social Adjustment
Sedentary Lifestyle
Frail Elderly
Cardiac Rehabilitation
Comorbidity
Rehabilitation
Gases
Hemodynamics
Walk Test

ASJC Scopus subject areas

  • Medicine(all)

Cite this

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abstract = "Older patients who receive postacute cardiac rehabilitation improve their physical performance in terms of distance walked at the 6-min walk test. However, the slower and more complicated recovery, along with age-related chronic comorbidities, remarkably limits the intensity of aerobic training, which actually represents the core of cardiac rehabilitation. The aim of this study was to verify whether postacute cardiac rehabilitation also improves the cardiovascular adjustment to exercise, despite low-intensity aerobic training. Using a portable gas analyzer, we assessed the O(2) uptake kinetics during the 6-min walk test at the beginning and at the end of the rehabilitation in 84 patients aged 65 yrs and above. All patients significantly improved the distance walked at the 6-min walk test. The comparison of the time constants of O(2) uptake kinetics showed that 40{\%} of patients also significantly improved the hemodynamic response to exercise. This improvement was independently associated with the report of sedentary lifestyle or low-intensity physical activity in the year before surgery and with longer time constants before physical training. Low-intensity aerobic training improves the cardiovascular adjustment to exercise selectively in patients with physical deconditioning. This confirms the notion that elderly frail patients are those who benefit most from cardiac rehabilitation.",
author = "Raffaele Molino-Lova and Federica Vannetti and Guido Pasquini and Anita Paperini and Renato Zipoli and Paola Polcaro and Mario Petrilli and Francesca Cecchi and Claudio Macchi",
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AU - Molino-Lova, Raffaele

AU - Vannetti, Federica

AU - Pasquini, Guido

AU - Paperini, Anita

AU - Zipoli, Renato

AU - Polcaro, Paola

AU - Petrilli, Mario

AU - Cecchi, Francesca

AU - Macchi, Claudio

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