Kylie Hill1, Thomas E Dolmage2, Lynda Woon3, Debbie Coutts4, Roger Goldstein5, Dina Brooks6. 1. Department of Respiratory Medicine, Toronto, ON, Canada; Departments of Physical Therapy and Medicine, University of Toronto, Toronto, ON, Canada; School of Physiotherapy and Curtin Health Innovation Research Institute, Curtin University, Bentley, WA, Australia; Lung Institute of Western Australia and Centre for Asthma, Allergy and Respiratory Research, University of Western Australia, Crawley, WA, Australia. 2. Department of Respiratory Medicine, Toronto, ON, Canada; Respiratory Diagnostic and Evaluations Services, West Park Healthcare Centre, Toronto, ON, Canada. 3. Department of Respiratory Medicine, Toronto, ON, Canada. 4. Department of Respiratory Medicine, Credit Valley Hospital, Mississauga, ON, Canada. 5. Department of Respiratory Medicine, Toronto, ON, Canada; Departments of Physical Therapy and Medicine, University of Toronto, Toronto, ON, Canada. 6. Department of Respiratory Medicine, Toronto, ON, Canada; Departments of Physical Therapy and Medicine, University of Toronto, Toronto, ON, Canada. Electronic address: dina.brooks@utoronto.ca.
Abstract
BACKGROUND: The aims of this study were to determine which tests of exercise capacity relate to average daily energy expenditure (DEE) and to quantify aerobic reserve during daily life in people with COPD. METHODS: A cross-sectional study was undertaken in 26 people with COPD (16 men; FEV(1), 50% ± 16%). Six-min walk distance (6MWD) and incremental shuttle walk distance (ISWD) measures were collected, and peak oxygen uptake (VO(2) peak) was measured during a symptom-limited ramp cycle ergometry test. The SenseWear Armband was worn during the waking hours for 4.4 ± 1.1 days to measure DEE. The intensity at which activities of daily living were undertaken was expressed as a percentage of VO(2) peak. RESULTS: DEE was associated with 6MWD (r = 0.40, P = .046) and ISWD (r = 0.52, P = .007) but not VO(2) peak (mL/kg per min) (r = 0.07, P = .74). Stronger associations were observed between DEE and the body weight-walking distance product for the 6MWD (r = 0.73, P < .001) and ISWD (r = 0.75, P < .001). The average intensity of daily activity was equivalent to 58% ± 11% of VO(2) peak, leaving an average aerobic reserve of 42%. CONCLUSIONS: Both 6MWD and ISWD, but not VO(2) peak, were related to DEE. Because activities of daily living were performed at a high percentage of VO(2) peak, it may be more realistic to optimize habitual DEE in COPD by increasing the frequency or duration rather than the intensity of physical activity.
BACKGROUND: The aims of this study were to determine which tests of exercise capacity relate to average daily energy expenditure (DEE) and to quantify aerobic reserve during daily life in people with COPD. METHODS: A cross-sectional study was undertaken in 26 people with COPD (16 men; FEV(1), 50% ± 16%). Six-min walk distance (6MWD) and incremental shuttle walk distance (ISWD) measures were collected, and peak oxygen uptake (VO(2) peak) was measured during a symptom-limited ramp cycle ergometry test. The SenseWear Armband was worn during the waking hours for 4.4 ± 1.1 days to measure DEE. The intensity at which activities of daily living were undertaken was expressed as a percentage of VO(2) peak. RESULTS: DEE was associated with 6MWD (r = 0.40, P = .046) and ISWD (r = 0.52, P = .007) but not VO(2) peak (mL/kg per min) (r = 0.07, P = .74). Stronger associations were observed between DEE and the body weight-walking distance product for the 6MWD (r = 0.73, P < .001) and ISWD (r = 0.75, P < .001). The average intensity of daily activity was equivalent to 58% ± 11% of VO(2) peak, leaving an average aerobic reserve of 42%. CONCLUSIONS: Both 6MWD and ISWD, but not VO(2) peak, were related to DEE. Because activities of daily living were performed at a high percentage of VO(2) peak, it may be more realistic to optimize habitual DEE in COPD by increasing the frequency or duration rather than the intensity of physical activity.
Authors: Rafael Mesquita; Gabriele Spina; Fabio Pitta; David Donaire-Gonzalez; Brenda M Deering; Mehul S Patel; Katy E Mitchell; Jennifer Alison; Arnoldus Jr van Gestel; Stefanie Zogg; Philippe Gagnon; Beatriz Abascal-Bolado; Barbara Vagaggini; Judith Garcia-Aymerich; Sue C Jenkins; Elisabeth Apm Romme; Samantha Sc Kon; Paul S Albert; Benjamin Waschki; Dinesh Shrikrishna; Sally J Singh; Nicholas S Hopkinson; David Miedinger; Roberto P Benzo; François Maltais; Pierluigi Paggiaro; Zoe J McKeough; Michael I Polkey; Kylie Hill; William D-C Man; Christian F Clarenbach; Nidia A Hernandes; Daniela Savi; Sally Wootton; Karina C Furlanetto; Li W Cindy Ng; Anouk W Vaes; Christine Jenkins; Peter R Eastwood; Diana Jarreta; Anne Kirsten; Dina Brooks; David R Hillman; Thaís Sant'Anna; Kenneth Meijer; Selina Dürr; Erica Pa Rutten; Malcolm Kohler; Vanessa S Probst; Ruth Tal-Singer; Esther Garcia Gil; Albertus C den Brinker; Jörg D Leuppi; Peter Ma Calverley; Frank Wjm Smeenk; Richard W Costello; Marco Gramm; Roger Goldstein; Miriam Tj Groenen; Helgo Magnussen; Emiel Fm Wouters; Richard L ZuWallack; Oliver Amft; Henrik Watz; Martijn A Spruit Journal: Chron Respir Dis Date: 2017-02-24 Impact factor: 2.444