Outcome assessments
fatigue, COM
Primary outcomes included changes between baseline and 4-week follow-up in gait, quantified by walking speed, and balance, quantified by center of mass (COM) postural sway (Fig. Balance and gait tasks performed using two wearable inertial sensors. For balance tasks, sensors were placed on the lower back and dominant shin. For gait tasks, sensors were placed on each shin.For gait tasks, the same two wearable sensors used in the iExergame were attached to the anterior aspects of left and right shanks to quantify spatiotemporal gait parameters. Participants were asked to walk at their habitual speed for 15 m without any distraction (Single Task Walking). Then, they repeated the test while counting backward from a random number in a loud voice (Dual Task Walking). One walking trial was collected per task (single and dual) due to participant fatigue, and the middle 5 strides of each trial were used in analysis. Gait speed (m/s), stride length (m), stride time (s), and double-limb support time (%), were calculated using validated algorithmsFor balance tasks, one wearable sensor was attached to the anterior aspect of the dominant shank, and another wearable sensor was attached to the lower back. Balance parameters were quantified using BalanSens™ (BioSensics LLC, Newton, MA), which measures: ankle and hip motion in three dimensions, COM sway, and coordination between ankle and hip motion