6MWT does not reflect activity in primary care COPD patients

Researchers have found that functional exercise capacity does not reflect physical activity among chronic obstructive pulmonary disease (COPD) patients treated in primary care.

In a study of 51 patients, there was no significant correlation between achievement in the 6-minute walk test (6MWT) and actual daily activity, such as the number of steps taken or total active time.

Authors Annemieke Fastenau (Maastricht University Medical Centre, the Netherlands) and colleagues say the findings suggest that primary care physicians should tailor the treatment of COPD patients to adjust the balance between trying to increase exercise capacity and daily physical activity.

“These results reinforce the importance of measuring daily physical activity in order to fine-tune treatment,” they comment.

Their study included primary care-treated COPD patients with mild–moderate disease (mean forced expiratory volume in 1 second [FEV1], 74% predicted).

Overall, 6MWT values were similar to those expected for healthy individuals (mean, 487 m). But measurement over 3 days and nights with an accelerometer showed that patients had a mean physical activity level (PAL) of 1.45, where a PAL of 1.40–1.69 defines a predominantly sedentary person. And patients achieved on average only 65% of the recommended 10,000 steps per day.

There was no significant correlation between distance achieved in the 6MWT and any of the physical activity variables, including steps per day, movement intensity during walking, time spent walking per day, total active time, time in moderate physical activity, time in vigorous activity level, and PAL. For example, among those with normal functional exercise capacity, the number of steps walked per day ranged from 3000 to 15,000.

Writing in the Primary Care Respiratory Journal, Fastenau and colleagues say that the study “reinforces the idea that, although FEV1, [Medical Research Council] dyspnoea scale and even functional exercise capacity might be important outcomes to indicate the severity of the disease… daily physical activity provides a supplementary concept, especially in patients with mild to moderate COPD.”

Licensed from medwireNews with permission from Springer Healthcare Ltd. ©Springer Healthcare Ltd. All rights reserved. Neither of these parties endorse or recommend any commercial products, services, or equipment.

Kirsty Oswald

Written by

Kirsty Oswald

Kirsty has a B.Sc. in Human Sciences from University College London. After several years working as medical copywriter, she became a medical journalist and is now freelance. Kirsty also works part-time as an editor for a London-based charity. She is particularly interested in the social and cultural aspects of science.


Please use one of the following formats to cite this article in your essay, paper or report:

  • APA

    Oswald, Kirsty. (2018, August 23). 6MWT does not reflect activity in primary care COPD patients. News-Medical. Retrieved on October 05, 2022 from https://www.news-medical.net/news/20131118/6MWT-does-not-reflect-activity-in-primary-care-COPD-patients.aspx.

  • MLA

    Oswald, Kirsty. "6MWT does not reflect activity in primary care COPD patients". News-Medical. 05 October 2022. <https://www.news-medical.net/news/20131118/6MWT-does-not-reflect-activity-in-primary-care-COPD-patients.aspx>.

  • Chicago

    Oswald, Kirsty. "6MWT does not reflect activity in primary care COPD patients". News-Medical. https://www.news-medical.net/news/20131118/6MWT-does-not-reflect-activity-in-primary-care-COPD-patients.aspx. (accessed October 05, 2022).

  • Harvard

    Oswald, Kirsty. 2018. 6MWT does not reflect activity in primary care COPD patients. News-Medical, viewed 05 October 2022, https://www.news-medical.net/news/20131118/6MWT-does-not-reflect-activity-in-primary-care-COPD-patients.aspx.


The opinions expressed here are the views of the writer and do not necessarily reflect the views and opinions of News Medical.
Post a new comment
You might also like...
Study aims to understand how SARS-CoV-2 affects the brain long-term