Smartphone-Based VO2max Measurement With Heart Snapshot in Clinical and Real-world Settings With a Diverse Population: Validation Study

Dan E Webster   ^{1 *} , PhD ;   Meghasyam Tummalacherla   ^{1 *} , MS ;   Michael Higgins   ² , MS, XT ;   David Wing   ² , CPT, MS, CBDT ;   Euan Ashley   ³ , MD, PhD ;   Valerie E Kelly   ⁴ , PT, PhD ;   Michael V McConnell   ^{5, 6} , MD, MSEE ;   Evan D Muse   ⁷ , MD ;   Jeffrey E Olgin   ⁸ , MD ;   Lara M Mangravite   ¹ , PhD ;   Job Godino   ^{2, 7} , PhD ;   Michael R Kellen   ^{1 *} , PhD ;   Larsson Omberg   ^{1 *} , PhD

¹ Sage Bionetworks, Seattle, WA, United States

² Exercise and Physical Activity Resource Center, University of California at San Diego, San Diego, CA, United States

³ Department of Genetics, Stanford University School of Medicine, Stanford, CA, United States

⁴ Department of Rehabilitation Medicine, University of Washington, Seattle, WA, United States

⁵ Stanford University School of Medicine, Stanford, CA, United States

⁶ Google Health, Palo Alto, CA, United States

⁷ Scripps Research Translational Institute and Scripps Clinic, La Jolla, CA, United States

⁸ Division of Cardiology and the Cardiovascular Research Institute, University of California San Francisco, San Francisco, CA, United States

*these authors contributed equally