Convergent Validity of the Fitbit Charge 2 to Measure Sedentary Behavior and Physical Activity in Overweight and Obese Adults. - McVeigh, Joanne A.; Ellis, Jennifer; Ross, Caitlin; Kim Tang; Phoebe Wan; Halse, Rhiannon E.; Dhaliwal, Satvinder Singh (Journal for the Measurement of Physical Behaviour, 2021)