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(Chest. 2006;130:126-132.)
© 2006 American College of Chest Physicians

Study of Energy Expenditure During Activities of Daily Living Using and Not Using Body Position Recommended by Energy Conservation Techniques in Patients With COPD*

Marcelo Velloso, PT, PhD and José R. Jardim, MD

* From the Respiratory Division, Federal University of São Paulo, São Paulo, Brazil.

Correspondence to: José R. Jardim, MD, Rua Botucatu, 740-3°, Andar, Disciplina de Pneumologia (Respiratory Division), Centro de Reabilitação Pulmonar Unifesp/Lar Escola São Francisco, 04023–062 São Paulo, S.P., Brazil; e-mail: joserjardim{at}yahoo.com.br

Abstract

Study objectives: To assess the energy spent by COPD patients using or not using energy conservation techniques (ECTs) during activities of daily living (ADL).

Method: The patients were evaluated in two different situations as stated above. For both applications, the following variables were measured during four ADL with or without using postures recommended by ECTs: metabolic (oxygen consumption [VO2] and carbon dioxide production [VCO2]), ventilatory (minute ventilation), cardiovascular (heart rate [HR] and oxygen pulse), and dyspnea (Borg score).

Participants: Sixteen male COPD patients (mean age, 62 years) with moderate-to-very-severe COPD (mean FEV1, 40%) participated in the study.

Measurements and results: The use of ECTs during ADL related to personal hygiene reduced VO2 (13.4%), VCO2 (12.8%), HR (13.7%), and Borg score (1 point) [p < 0.05]. Putting on and taking off shoes did not change VO2, VCO2, and HR but reduced the Borg score (0.6 point) [p < 0.05]. Storing groceries on high shelves reduced VO2 (12.2%), VCO2 (9.9%), HR (5.1%), and Borg score (0.75 point). Storing groceries on low shelves reduced VO2 (28.1%), VCO2 (24.3%), HR (5.4%), and Borg score (0.8 point) [p < 0.05].

Conclusion: The use of energy conservation techniques in COPD patients during ADL reduces energy cost and dyspnea perception.

Key Words: activities of daily living • COPD • dyspnea • energy conservation techniques • exercise • pulmonary rehabilitation






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