Prediction of Energy Expenditure From Wrist Accelerometry in People With and Without Down Syndrome

• Autores: Stamatis Agiovlasitis, Robert W. Motl, John T. Foley, Bo Fernhall
• Localización: Adapted physical activity quaterly, ISSN 0736-5829, Vol. 29, Nº. 2, 2012, págs. 179-190
• Idioma: inglés
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• Resumen

  • This study examined the relationship between energy expenditure and wrist accel­erometer output during walking in persons with and without Down syndrome (DS). Energy expenditure in metabolic equivalent units (METs) and activity-count rate were respectively measured with portable spirometry and a uniaxial wrist accel­erometer in 17 persons with DS (age: 24.7 ± 6.9 years; 9 women) and 21 persons without DS (age: 26.3 ± 5.2 years; 12 women) during six over-ground walking trials. Combined groups regression showed that the relationship between METs and activity-count rate differed between groups (p < .001). Separate models for each group included activity-count rate and squared activity-count rate as significant predictors of METs (p = .005). Prediction of METs appeared accurate based on Bland-Altman plots and the lack of between-group difference in mean absolute prediction error (DS: 17.07%; Non-DS: 18.74%).Although persons with DS show altered METs to activity-count rate relationship during walking, prediction of their energy expenditure from wrist accelerometry appears feasible.