Length of exercise training in COPD: a single-subject design

Authors

  • Danielle Soares Rocha Vieira Department of Physical Therapy - Federal University of Santa Catarina
  • Danielle Correa França Rehabilitation Science Program - Federal University of Minas Gerais
  • Danielle Aparecida Gomes Pereira Department of Physical Therapy - Federal University of Minas Gerais
  • Rosana Ferreira Sampaio Department of Physical Therapy - Federal University of Minas Gerais
  • Raquel Rodrigues Britto Department of Physical Therapy - Federal University of Minas Gerais
  • Veronica Franco Parreira Department of Physical Therapy - Federal University of Minas Gerais

Keywords:

Chronic Obstructive Pulmonary Disease (COPD), exercise training, single-subject design.

Abstract

Backgroud: The minimum duration of exercise training in patients with Chronic Obstructive Pulmonary Disease (COPD) is still discussed.

Objectives:  To document, over time, the effects of a lower-limb endurance training program in a patient with COPD, evaluating when changes in the exercise capacity initiate and if these changes stabilize during the intervention period.

Methods: A 73-year-old male COPD patient (FEV1 0.92 L) performed three 30-minute training sessions per week, during 12 weeks, at 70% of peak work rate. A metabolic analyzer system was used to evaluate the participant, at regular intervals, during an incremental, symptom-limited cycle ergometer exercise test. Peak and isowork exercise variables were studied. Data were analyzed with visual analysis, associated with Kappa statistic, two-standard deviation band, celebration line and regression analysis. Significance was accepted at (p<0.05).

Results: Peak exercise variables as work rate, carbon dioxide output and ventilation (VE) increased significantly. At a same workload, oxygen uptake (VO2), (VE), perceived exertion and heart rate decreased and peripheral oxygen saturation (SpO2) increased significantly. Changes in exercise capacity verified by VE,VO2, perceived exertion and SpO2, at isowork condition, were observed in the fourth week of training. Regression analysis showed that VO2and respiratory frequency decreased significantly in the course of intervention, while tidal volume and SpO2 increased during this phase.

Conclusions: The participant improved his exercise tolerance after the training program. Changes in exercise capacity initiated in the fourth week of intervention and continued until the end of the training program.

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Published

08-12-2015

How to Cite

VIEIRA, D. S. R.; FRANÇA, D. C.; PEREIRA, D. A. G.; SAMPAIO, R. F.; BRITTO, R. R.; PARREIRA, V. F. Length of exercise training in COPD: a single-subject design. Journal of Respiratory and CardioVascular Physical Therapy, [S. l.], v. 2, n. 2, p. 42–51, 2015. Disponível em: https://periodicos.ufrn.br/revistadefisioterapia/article/view/6036. Acesso em: 18 jun. 2024.

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