What the 4-metre gait speed measures and why it cannot replace functional capacity tests

Affiliations

• ¹ NIHR Respiratory Biomedical Research Unit, Royal Brompton and Harefield NHS Foundation Trust and Imperial College, London s.kon@rbht.nhs.uk.
• ² NIHR Respiratory Biomedical Research Unit, Royal Brompton and Harefield NHS Foundation Trust and Imperial College, London.
• ³ 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.
• ⁴ Harefield Pulmonary Rehabilitation Unit, Royal Brompton and Harefield NHS Foundation Trust, London, UK.