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A More Intense Examination of the Intensity of Physical Activity in People Living with Chronic Obstructive Pulmonary Disease: Insights from Threshold-Free Markers of Activity Intensity

Andrew P. Kingsnorth (), Alex V. Rowlands, Benjamin D. Maylor, Lauren B. Sherar, Michael C. Steiner, Mike D. Morgan, Sally J. Singh, Dale W. Esliger and Mark W. Orme
Additional contact information
Andrew P. Kingsnorth: Diabetes Research Centre, University of Leicester, Leicester General Hospital, Leicester LE5 4PW, UK
Alex V. Rowlands: Diabetes Research Centre, University of Leicester, Leicester General Hospital, Leicester LE5 4PW, UK
Benjamin D. Maylor: Diabetes Research Centre, University of Leicester, Leicester General Hospital, Leicester LE5 4PW, UK
Lauren B. Sherar: School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough LE11 3TU, UK
Michael C. Steiner: Department of Respiratory Sciences, University of Leicester, Leicester LE1 9HN, UK
Mike D. Morgan: Department of Respiratory Sciences, University of Leicester, Leicester LE1 9HN, UK
Sally J. Singh: Department of Respiratory Sciences, University of Leicester, Leicester LE1 9HN, UK
Dale W. Esliger: School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough LE11 3TU, UK
Mark W. Orme: Department of Respiratory Sciences, University of Leicester, Leicester LE1 9HN, UK

IJERPH, 2022, vol. 19, issue 19, 1-16

Abstract: Physical activity (PA) intensity of people living with chronic obstructive pulmonary disease (COPD) is typically evaluated using intensity thresholds developed in younger, healthier populations with greater exercise capacity and free from respiratory symptoms. This study therefore compared (i) PA differences between COPD and non-COPD controls using both traditional intensity thresholds and threshold-free metrics that represent the volume and intensity of the whole PA profile, and (ii) explored the influence of exercise capacity on observed differences. Moderate-to-vigorous physical activity (MVPA), average acceleration (proxy for volume, mg) and intensity distribution of activity were calculated for 76 individuals with COPD and 154 non-COPD controls from wrist-worn ActiGraph accelerometry. PA profiles representing the minimum intensity (acceleration, mg) during the most active accumulated 5–960 min were plotted. Estimated VO 2peak and relative intensity were derived from the incremental shuttle walk test distance. Compared to the non-COPD control group, individuals with COPD recorded fewer MVPA minutes (59 vs. 83 min/day), lower overall waking activity (29.1 vs. 36.4 mg) and a poorer waking intensity distribution (?2.73 vs. ?2.57). Individuals with COPD also recorded a lower absolute intensity (acceleration, mg) for their most active 5–960 min, but higher intensity relative to their estimated exercise capacity derived from the ISWT. People with COPD have a lower volume and absolute intensity of PA than controls but perform PA at a higher relative intensity. There is a need to move away from absolute intensity thresholds, and towards personalised or relative-intensity thresholds, to reflect reduced exercise capacity in COPD populations.

Keywords: COPD; exercise capacity; physical activity (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2022
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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