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

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

(B) to (E) show Bland-Altman plots comparing the gold standard VO2max with smartphone measures from: (B) 12-MRT performed in clinic, (C) 12-MRT performed remotely (up to 3 repeats per participant), (D) 3-MST in clinic, and (E) 3-MST remotely. VO2max: maximal oxygen consumption; 3-MST: 3-minute step test; 12-MRT: 12-minute run test. The in-clinic 12-MRT distance was measured on a 400-m track and by the smartphone GPS.

Dan E Webster, Meghasyam Tummalacherla, Michael Higgins, David Wing, Euan Ashley, Valerie E Kelly, Michael V McConnell, Evan D Muse, Jeffrey E Olgin, Lara M Mangravite, Job Godino, Michael R Kellen, Larsson Omberg

JMIR Mhealth Uhealth 2021;9(6):e26006

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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

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

Walking E. Moderately active, and F. Vigorously active. Fitbit measurements were acquired during the same period queried by self-report (IPAQ). Dashed lines represent identical measurements. Overall activity was measured on different scales (Fitbit, steps/d; IPAQ, MET-h/wk) and no dashed line is provided. IPAQ: International Physical Activity Questionnaire; MET: metabolic equivalent of task. The subset of participants with a BMI measurement was included in the BMI analysis sample (n=586).

Alexander J Beagle, Geoffrey H Tison, Kirstin Aschbacher, Jeffrey E Olgin, Gregory M Marcus, Mark J Pletcher

JMIR Mhealth Uhealth 2020;8(12):e22090

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Comparison of On-Site Versus Remote Mobile Device Support in the Framingham Heart Study Using the Health eHeart Study for Digital Follow-up: Randomized Pilot Study Set Within an Observational Study Design

Comparison of On-Site Versus Remote Mobile Device Support in the Framingham Heart Study Using the Health eHeart Study for Digital Follow-up: Randomized Pilot Study Set Within an Observational Study Design

Innovative electronic cohort (e-Cohort) study designs that incorporate m Health technology into traditional cohort studies have been proposed, minimizing the requirement of physical resources by collecting data remotely (reducing or completely eliminating in-person clinical examinations) [7-10].

Nicole L Spartano, Honghuang Lin, Fangui Sun, Kathryn L Lunetta, Ludovic Trinquart, Maureen Valentino, Emily S Manders, Mark J Pletcher, Gregory M Marcus, David D McManus, Emelia J Benjamin, Caroline S Fox, Jeffrey E Olgin, Joanne M Murabito

JMIR Mhealth Uhealth 2019;7(9):e13238

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Article has an altmetric score of 4