Stroke is a prevalent medical condition in the United States, often resulting in motor function impairment and a loss of independence in daily activities for survivors. Effective stroke rehabilitation is urgently needed, yet existing trials have faced challenges due to the lack of reliable outcome measures spanning the spectrum of motor impairment. This research project aims to validate the Restore Center's Sit2Stand assessment tool in chronic stroke patients (stroke>6 months prior) and demographically matched older adults. The primary objective is to establish Sit2Stand's concurrent validity in clinical and home settings and to investigate its potential for predicting community gait.