Leveraging Smartwatch-Based Accelerometry to Assess Functional Capacity in Older Adults

de Lucena E.G.P.; Ito R.C.; Lopes R.F.T.; Tessutti V.; Vega Oliveros D.A.; Soriano-Vargas A.; Von Zuben F.J.; Rocha A.; Uchida M.C. · Physical and Occupational Therapy in Geriatrics (2026) · DOI: 10.1080/02703181.2026.2692390

Resumen

Aim: This study compared functional capacity in healthy and sarcopenia-prone older adults, examining the associations between smartwatch-derived accelerometry features and the Five Times Sit-to-Stand Test (5xSTS). Methods: Eighty older adults were assessed; analyses included 47 with complete 5xSTS accelerometry data. Temporal and statistical features were compared between groups and correlated with 5xSTS time. Results: Sarcopenia-prone older adults showed lower 5xSTS performance (p < 0.05; Δ = −50.5%) compared to healthy older adults. Accelerometry features differed between groups, and resultant acceleration variables remained significant after age adjustment. ROC analyses demonstrated acceptable discriminatory ability for minimum resultant (AUC: 0.817) and SD (AUC: 0.787) acceleration, and 5xSTS duration (AUC: 0.758). Accelerometry features correlated with 5xSTS, particularly for minimum resultant acceleration (r = 0.74) in the sarcopenia-prone group. Conclusion: Smartwatch-based accelerometry during the 5xSTS provides relevant data of functional decline and supports wrist-worn devices for monitoring physical function in older adults.

Instituciones: Universidad de Ingeniería y Tecnología