Activity monitoring and energy expenditure in COPD patients: A validation study

Sanjay A. Patel, Roberto P Benzo, William A. Slivka, Frank C. Sciurba

Research output: Contribution to journalArticle

98 Citations (Scopus)

Abstract

There is increasing interest in the objective measurement of physical activity in chronic obstructive pulmonary disease (COPD) patients due to the close relationship between physical activity level, health, disability and mortality. We aimed to (a) determine the validity and reproducibility of an activity monitor that integrates accelerometry with multiple physiologic sensors in the determination of energy expenditure in COPD subjects and (b) to document the independent contribution of the additional physiologic sensors to accelerometry measures in improving true energy expenditure determination. Eight subjects (4 male, FEV1 56.4 ± 14.1%, RV 145.0 ± 75.7%) performed 2 separate 6-minute walk and 2 incremental shuttle walk exercise tests. Energy expenditure was calculated during each exercise test using the physiologic activity monitor and compared to a validated exhaled breath metabolic system. Test-retest reproducibility of physiologic activity monitor during the walking tests was comparable to an exhaled breath metabolic system. Physiologic sensor data significantly improved the explained variance in energy expenditure determination (r2 = 0.88) compared to accelerometry data alone (r2 = 0.68). This physiologic activity monitor provides a valid and reproducible estimate of energy expenditure during slow to moderate paced walking in a laboratory setting and represents an objective method to assess activity in COPD subjects.

Original languageEnglish (US)
Pages (from-to)107-112
Number of pages6
JournalCOPD: Journal of Chronic Obstructive Pulmonary Disease
Volume4
Issue number2
DOIs
StatePublished - Apr 2007
Externally publishedYes

Fingerprint

Validation Studies
Chronic Obstructive Pulmonary Disease
Energy Metabolism
Accelerometry
Exercise Test
Walking
Exercise
Health Status
Mortality

Keywords

  • Activities Of Daily Living
  • Ambulatory Monitoring
  • COPD
  • Energy Expenditure
  • Exercise Test

ASJC Scopus subject areas

  • Pulmonary and Respiratory Medicine

Cite this

Activity monitoring and energy expenditure in COPD patients : A validation study. / Patel, Sanjay A.; Benzo, Roberto P; Slivka, William A.; Sciurba, Frank C.

In: COPD: Journal of Chronic Obstructive Pulmonary Disease, Vol. 4, No. 2, 04.2007, p. 107-112.

Research output: Contribution to journalArticle

Patel, Sanjay A. ; Benzo, Roberto P ; Slivka, William A. ; Sciurba, Frank C. / Activity monitoring and energy expenditure in COPD patients : A validation study. In: COPD: Journal of Chronic Obstructive Pulmonary Disease. 2007 ; Vol. 4, No. 2. pp. 107-112.
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