Can ventilation-feedback training augment exercise tolerance in patients with chronic obstructive pulmonary disease?
Am J Respir Crit Care Med
; 177(8): 844-52, 2008 Apr 15.
Article
en En
| MEDLINE
| ID: mdl-18202351
ABSTRACT
RATIONALE Exercise-induced dynamic hyperinflation contributes to decreased exercise tolerance in chronic obstructive pulmonary disease (COPD). It is unknown whether respiratory retraining (ventilation-feedback [VF] training) can affect exercise-induced dynamic hyperinflation and increase exercise tolerance. OBJECTIVES:
To determine whether patients with COPD would achieve longer exercise duration if randomized to a combination of exercise training plus VF training than either form of training on its own.METHODS:
A total of 64 patients randomized to 1 of 3 groups VF plus exercise (n = 22), exercise alone (n = 20), and VF alone (n = 22). MEASUREMENTS AND MAINRESULTS:
Exercise duration before and after 36 training sessions and exercise-induced dynamic hyperinflation and respiratory pattern before and after training were measured. In the 49 patients who completed training, duration of constant work-rate exercise was 40.0 (+/- 20.4) minutes (mean +/- SD) with VF plus exercise, 31.5 (+/- 17.3) minutes with exercise alone, and 16.1 (+/- 19.3) minutes with VF alone. Exercise duration was longer in VF plus exercise than in VF alone (P < 0.0001), but did not reach predetermined statistical significance when VF plus exercise was compared with exercise alone (P = 0.022) (because of multiple comparisons, P = 0.0167 was used for statistical significance). After training, exercise-induced dynamic hyperinflation, measured at isotime, in VF plus exercise was less than in exercise alone (P = 0.014 for between-group changes) and less than in VF alone (P = 0.019 for between-group changes). After training, expiratory time was longer in VF plus exercise training (P < 0.001), and it was not significantly changed in the other two groups.CONCLUSIONS:
The combination of VF plus exercise training decreases exercise-induced dynamic hyperinflation and increases exercise duration more than VF alone. An additive effect to exercise training from VF was not demonstrated by predetermined statistical criteria.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Terapia Respiratoria
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Biorretroalimentación Psicológica
/
Ejercicios Respiratorios
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Tolerancia al Ejercicio
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Enfermedad Pulmonar Obstructiva Crónica
/
Terapia por Ejercicio
Tipo de estudio:
Clinical_trials
Límite:
Aged
/
Humans
/
Middle aged
Idioma:
En
Revista:
Am J Respir Crit Care Med
Asunto de la revista:
TERAPIA INTENSIVA
Año:
2008
Tipo del documento:
Article
País de afiliación:
Estados Unidos