RT info:eu-repo/semantics/article T1 Validation of ActiGraph and Fitbit in the assessment of energy expenditure in Huntington's disease A1 Simón Vicente, Lucía A1 Rodríguez Fernández, Alejandro A1 Rivadeneyra Posadas, Jéssica Jannett A1 Soto Célix, María . A1 Raya-González, Javier A1 Castillo, Daniel A1 Calvo Simal, Sara A1 Mariscal, Natividad A1 García Bustillo, Álvaro A1 Aguado, Laura A1 Cubo Delgado, Esther K1 Health promotion K1 Physical activity K1 Activity monitor K1 Rehabilitation K1 Exercise K1 Validation K1 Sistema nervioso-Enfermedades K1 Nervous system-Diseases K1 Medicina K1 Medicine K1 Terapéutica K1 Therapeutics K1 Neurología K1 Neurology AB Background: Consumer and research activity monitors have become popular because of their ability to quantifyenergy expenditure (EE) in free-living conditions. However, the accuracy of activity trackers in determining EE inpeople with Huntington’s Disease (HD) is unknown.Research question:Can the ActiGraph wGT3X-B or the Fitbit Charge 4 accurately measure energy expenditure during physicalactivity, in people with HD compared to Indirect Calorimetry (IC) (Medisoft Ergo Card)?Methods: We conducted a cross-sectional, observational study with fourteen participants with mild-moderate HD(mean age 55.7 ± 11.4 years). All participants wore an ActiGraph and Fitbit during an incremental test, runningon a treadmill at 3.2 km/h and 5.2 km/h for three minutes at each speed. We analysed and compared the accuracy of EE estimates obtained by Fitbit and ActiGraph against the EE estimates obtained by a metabolic cart,using with Intra-class correlation (ICC), Bland-Altman analysis and correlation tests.Results: A significant correlation and a moderate reliability was found between ActiGraph and IC for the incremental test (r = 0.667)(ICC=0.633). There was a significant correlation between Fitbit and IC during the incremental test (r = 0.701), but the reliability was poor at all tested speeds in the treadmill walk. Fitbitsignificantly overestimated EE, and ActiGraph underestimated EE compared to IC, but ActiGraph estimates weremore accurate than Fitbit in all tests.Significance: Compared to IC, Fitbit Charge 4 and ActiGraph wGT3X-BT have reduced accuracy in estimating EEat slower walking speeds. These findings highlight the need for population-specific algorithms and validation ofactivity trackers. PB Elsevier SN 0966-6362 YR 2024 FD 2024-03 LK http://hdl.handle.net/10259/8857 UL http://hdl.handle.net/10259/8857 LA spa NO The research leading to these results has received funding from “la Caixa” Foundation and Caja de Burgos Foundation, under agreement LCF/PR/PR18/51130008". DS Repositorio Institucional de la Universidad de Burgos RD 08-may-2024