Figure 2
From: Reliability of voluntary step execution behavior under single and dual task conditions
Foot-off times from the 1st, 2nd (an hour later) and 3rd (a week later) test session for the elderly and younger group of subjects, respectively, across 6 trials and Task conditions: single task condition (top) and dual task condition (bottom). Values represent mean foot-off times of elderly (filled square) and young (open circle) subjects. Vertical bars indicate one standard deviation. Notice decrease in foot-off times during the first test session for the elderly subjects, especially between the first and second trial under dual task conditions. A similar decrease is seen under dual task conditions for the third test session. Such effects were not present in the younger group.