The STRIDES Study will explore the use of gait speed as both a vital sign and digital clinical biomarker in a diverse population of older adults. This research will focus on gait speed variability and its associated health implications, including cognitive decline, sarcopenia, frailty, and an increased risk of falls. One segment of the study will examine how changes in gait speed correlate with mild cognitive impairment (MCI), particularly looking at the prevalence of motor-cognitive risk syndrome which is diminished gait speed in the context of MCI. By integrating feedback from participants, the study aims to refine gait speed measurement techniques and enhance care approaches, potentially leading to targeted interventions for mobility and cognitive health challenges. The insights gained could also support further longitudinal studies on gait speed variability and the development of integrated care strategies tailored to the needs of this population.