Authors' Reply to: Critique of "Physical Activity Assessment Between Consumer- and Research-Grade Accelerometers: A Comparative Study in Free-Living Conditions" - Does Location of the Device Matter?

JMIR Mhealth Uhealth. 2017 Feb 27;5(2):e13. doi: 10.2196/mhealth.7413.
No abstract available

Keywords: Fitbit; actigraphy; activity tracker; aerobic exercise; physical activity; validity.