Development of a rapid stepping test to challenge rapid weight-shifting function in older adults

Background The ability to step rapidly, shift weight from side-to-side, and maintain temporal rhythmicity are important functional elements for walking independently and preventing falls in seniors. Aims The purpose of this study was to develop a clinically feasible test of rapid stepping performance that challenges the ability to step rapidly, shift weight from side-to-side, and maintain temporal rhythmicity. Methods Participants were a volunteer sample of healthy, self-ambulating older adults aged 70–98 years. A Repeated Alternating Stair Touch Test was developed, which involved rapidly shifting weight in the medial–lateral direction by tapping each foot alternately onto a step. Performance on the test was assessed using trunk acceleration signals. Associations between the number of steps completed on the Repeated Alternating Stair Touch Test in 20 s and acceleration magnitude, variability, and stepping rhythmicity were assessed using Pearson correlations and linear regression. Repeatability was assessed during a 2-week follow-up period. Results The acceleration magnitude, variability, and stepping rhythmicity variables related moderately with the number of steps on the Repeated Alternating Stair Touch Test ( r = 0.534–0.572, p