Accuracy of consumer-based activity trackers as measuring tool and coaching device in patients with COPD and healthy controls

Background Consumer-based activity trackers are used to measure and improve physical activity. However, the accuracy of these devices as clinical endpoint or coaching tool is unclear. We investigated the use of two activity trackers as measuring and coaching tool in patients with Chronic Obstructive Pulmonary Disease (COPD) and healthy age-matched controls. Methods Daily steps were measured by two consumer-based activity trackers (Fitbit Zip,...