[HTML][HTML] Accuracy of Fitbit devices: systematic review and narrative syntheses of quantitative data

LM Feehan, J Geldman, EC Sayre, C Park… - JMIR mHealth and …, 2018 - mhealth.jmir.org
Background: Although designed as a consumer product to help motivate individuals to be
physically active, Fitbit activity trackers are becoming increasingly popular as measurement …

Bioelectrical impedance analysis for body composition assessment: reflections on accuracy, clinical utility, and standardisation

LC Ward - European journal of clinical nutrition, 2019 - nature.com
Bioelectrical impedance analysis is an extremely popular method for assessment of body
composition. Despite its wide-spread use over the past thirty years, its accuracy and clinical …

Population-scale CT-based body composition analysis of a large outpatient population using deep learning to derive age-, sex-, and race-specific reference curves

K Magudia, CP Bridge, CP Bay, A Babic, FJ Fintelmann… - Radiology, 2021 - pubs.rsna.org
Background Although CT-based body composition (BC) metrics may inform disease risk and
outcomes, obtaining these metrics has been too resource intensive for large-scale use …

Comparative evaluation of heart rate-based monitors: Apple Watch vs Fitbit Charge HR

Y Bai, P Hibbing, C Mantis, GJ Welk - Journal of sports sciences, 2018 - Taylor & Francis
The purpose of this investigation was to examine the validity of energy expenditure (EE),
steps, and heart rate measured with the Apple Watch 1 and Fitbit Charge HR. Thirty-nine …

How to construct, conduct and analyze an exercise training study?

A Hecksteden, O Faude, T Meyer, L Donath - Frontiers in physiology, 2018 - frontiersin.org
Randomized controlled trials (RCTs) can be regarded as gold standard in investigating dose-
response and causal relationships in exercise science. Recommendations for exercise …

Comprehensive comparison of Apple Watch and Fitbit monitors in a free-living setting

Y Bai, C Tompkins, N Gell, D Dione, T Zhang, W Byun - PLoS One, 2021 - journals.plos.org
Objectives The aim of this study was to evaluate the accuracy of three consumer-based
activity monitors, Fitbit Charge 2, Fitbit Alta, and the Apple Watch 2, all worn on the wrist, in …

A framework to evaluate devices that assess physical behavior

SK Keadle, KA Lyden, SJ Strath… - Exercise and sport …, 2019 - journals.lww.com
• Divergence in summary estimates within and between devices obstructs efforts to pool data
and preclude betweenstudy comparisons, which are necessary to develop coherent public …

[HTML][HTML] Standardizing analytic methods and reporting in activity monitor validation studies

GJ Welk, Y Bai, JM Lee, JOB Godino… - Medicine and science …, 2019 - ncbi.nlm.nih.gov
Methods This article reviewed the literature on the methods used to evaluate the validity of
contemporary consumer activity monitors. A rationale for focusing on energy expenditure as …

3-Dimensional optical scanning for body composition assessment: A 4-component model comparison of four commercially available scanners

GM Tinsley, ML Moore, ML Benavides, JR Dellinger… - Clinical Nutrition, 2020 - Elsevier
Background & aims Body composition assessment via 3-dimensional optical (3DO)
scanning has emerged as a rapid and simple evaluation method. The aim of this study was …

Agreement between self-reported pre-pregnancy weight and measured first-trimester weight in Brazilian women

T Rangel Bousquet Carrilho, K M. Rasmussen… - BMC Pregnancy and …, 2020 - Springer
Background Self-reported pre-pregnancy weight and weight measured in the first trimester
are both used to estimate pre-pregnancy body mass index (BMI) and gestational weight gain …