Fitbit Charge HR Wireless Heart Rate Monitor: Validation Study Conducted Under Free-Living Conditions.
Alexander Wilhelm GornySeaw Jia LiewChuen Seng TanFalk Müller-RiemenschneiderPublished in: JMIR mHealth and uHealth (2017)
Under free-living conditions, Fitbit trackers are affected by significant systematic errors. Improvements in tracker accuracy and sensitivity when measuring MVPA are required before they can be considered for use in the context of exercise prescription to promote better health.