Using Wear Time for the Analysis of Consumer-Grade Wearables’ Data: Case Study Using Fitbit Data

Loubna Baroudi   ¹ , MSc ;   Ronald Fredrick Zernicke   ^{2, 3} , MSc, ND, PhD ;   Muneesh Tewari   ^{4, 5, 6, 7} , PhD ;   Noelle E Carlozzi   ⁸ , PhD ;   Sung Won Choi   ⁹ , MSc, MD ;   Stephen M Cain   ¹⁰ , PhD

¹ Department of Mechanical Engineering, University of Michigan–Ann Arbor, Ann Arbor, MI, United States

² Department of Orthopedic Surgery, University of Michigan–Ann Arbor, Ann Arbor, MI, United States

³ Exercise & Sport Science Initiative, University of Michigan–Ann Arbor, Ann Arbor, MI, United States

⁴ Center for Computational Medicine and Bioinformatics, University of Michigan–Ann Arbor, Ann Arbor, MI, United States

⁵ Department of Internal Medicine, University of Michigan–Ann Arbor, Ann Arbor, MI, United States

⁶ Department of Biomedical Engineering, University of Michigan–Ann Arbor, Ann Arbor, MI, United States

⁷ Veterans Administration Ann Arbor Healthcare System, University of Michigan–Ann Arbor, Ann Arbor, MI, United States

⁸ Department of Physical Medicine and Rehabilitation, University of Michigan–Ann Arbor, Ann Arbor, MI, United States

⁹ Department of Pediatrics, University of Michigan–Ann Arbor, Ann Arbor, MI, United States

¹⁰ Department of Chemical and Biomedical Engineering, West Virginia University, Morgantown, WV, United States