Study of energy expenditure during activities of daily living using and not using body position recommended by energy conservation techniques in patients with COPD

Chest. 2006 Jul;130(1):126-32. doi: 10.1378/chest.130.1.126.


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 [V(O2)] and carbon dioxide production [V(CO2)]), 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 V(O2) (13.4%), V(CO2) (12.8%), HR (13.7%), and Borg score (1 point) [p < 0.05]. Putting on and taking off shoes did not change V(O2), V(CO2), and HR but reduced the Borg score (0.6 point) [p < 0.05]. Storing groceries on high shelves reduced V(O2) (12.2%), V(CO2) (9.9%), HR (5.1%), and Borg score (0.75 point). Storing groceries on low shelves reduced V(O2) (28.1%), V(CO2) (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.

Publication types

  • Clinical Trial
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Activities of Daily Living*
  • Adult
  • Aged
  • Energy Metabolism*
  • Forced Expiratory Volume
  • Humans
  • Hygiene
  • Male
  • Middle Aged
  • Pulmonary Disease, Chronic Obstructive / metabolism*
  • Pulmonary Disease, Chronic Obstructive / rehabilitation
  • Time Factors