title: What the 4-metre gait speed measures and why it cannot replace functional capacity tests.
authors.affiliation: NIHR Respiratory Biomedical Research Unit, Royal Brompton and Harefield NHS Foundation Trust and Imperial College, London s.kon@rbht.nhs.uk.
authors.forename: Samantha S C
authors.initials: SS
authors.lastname: Kon
authors.affiliation: NIHR Respiratory Biomedical Research Unit, Royal Brompton and Harefield NHS Foundation Trust and Imperial College, London.
authors.forename: Jane L
authors.initials: JL
authors.lastname: Canavan
authors.affiliation: NIHR Respiratory Biomedical Research Unit, Royal Brompton and Harefield NHS Foundation Trust and Imperial College, London Harefield Pulmonary Rehabilitation Unit, Royal Brompton and Harefield NHS Foundation Trust, London, UK.
authors.forename: Claire M
authors.initials: CM
authors.lastname: Nolan
authors.affiliation: Harefield Pulmonary Rehabilitation Unit, Royal Brompton and Harefield NHS Foundation Trust, London, UK.
authors.forename: Amy L
authors.initials: AL
authors.lastname: Clark
authors.affiliation: NIHR Respiratory Biomedical Research Unit, Royal Brompton and Harefield NHS Foundation Trust and Imperial College, London.
authors.forename: Sarah E
authors.initials: SE
authors.lastname: Jones
authors.affiliation: NIHR Respiratory Biomedical Research Unit, Royal Brompton and Harefield NHS Foundation Trust and Imperial College, London.
authors.forename: Paul
authors.initials: P
authors.lastname: Cullinan
authors.affiliation: NIHR Respiratory Biomedical Research Unit, Royal Brompton and Harefield NHS Foundation Trust and Imperial College, London.
authors.forename: Michael I
authors.initials: MI
authors.lastname: Polkey
authors.affiliation: NIHR Respiratory Biomedical Research Unit, Royal Brompton and Harefield NHS Foundation Trust and Imperial College, London Harefield Pulmonary Rehabilitation Unit, Royal Brompton and Harefield NHS Foundation Trust, London, UK.
authors.forename: William D-C
authors.initials: WD
authors.lastname: Man
mesh_terms: D005260:Female; D005684:Gait; D006801:Humans; D008297:Male; D029424:Pulmonary Disease, Chronic Obstructive / Q000503:physiopathology* / Q000628:therapy*