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Accuracy of the Apple Watch Series 4 and Fitbit Versa for Assessing Energy Expenditure and Heart Rate of Wheelchair Users During Treadmill Wheelchair Propulsion: Cross-sectional Study

Accuracy of the Apple Watch Series 4 and Fitbit Versa for Assessing Energy Expenditure and Heart Rate of Wheelchair Users During Treadmill Wheelchair Propulsion: Cross-sectional Study

Participants wore a facemask (7450 V2 Series; Hans Rudolph Inc), which was connected to a Vyntus CPX ergospirometer with a mixing chamber (Vyaire, Medical Gmb H) to measure gas exchange as 10-second averages, from which the criterion device EE was calculated. The Vyntus CPX was calibrated against a known gas mixture of 15% O2 and 5% CO2 before every test.

Marius Lyng Danielsson, Melanie Vergeer, Guy Plasqui, Julia Kathrin Baumgart

JMIR Form Res 2024;8:e52312