Identification of changes in kinematics and electromyographic parameters during dual-task gait: a comparative study between young and elderly female subjects

Abstract Introduction : Falls during gait are one of the leading causes of death and injuries in elderly adults. Objective : This study aimed to compare the performance of young (YG) and elderly (EG) adults during dual-task gait (using a traffic light simulator) according to kinematics and electromyographic parameters. Materials and methods : 17 young and 18 elderly physically fit female subjects participated in this study. The volunteers walked on a treadmill under two different conditions: normal gait (M1) and dual-task gait (M2). We recorded EMG signals from the rectus femoris (RF), vastus medialis (VM), vastus lateralis (VL), biceps femoris (BF), tibialis anterior (TA), gastrocnemius lateralis (GL) and soleus (SO). The following kinematic data were obtained: step length, step time and self-selected velocity. Data analysis was performed using Wilcoxon's, Mann-Whitney, T-student tests and T-student for independent samples. The level of significance was set at p