Comparison of the Physical Activity Measured by a Consumer Wearable Activity Tracker and That Measured by Self-Report: Cross-Sectional Analysis of the Health eHeart Study

Alexander J Beagle   ¹ , MD ;   Geoffrey H Tison   ² , MPH, MD ;   Kirstin Aschbacher   ² , PhD ;   Jeffrey E Olgin   ² , MD ;   Gregory M Marcus   ² , MAS, MD ;   Mark J Pletcher   ³ , MPH, MD

¹ Department of Medicine, University of California San Francisco, San Francisco, CA, United States

² Division of Cardiology, Department of Medicine, University of California San Francisco, San Francisco, CA, United States

³ Department of Epidemiology and Biostatistics, University of California San Francisco, San Francisco, CA, United States