Falls are among the most common and devastating concern facing older adults. The scope of this problem will continue to expand as the number of older adults is projected to increase dramatically over the coming decades. Since most falls occur as a result of a complex interaction of risk factors, considerable evidence documents that gait instability and poor balance capacity are two major contributors to falling. A large proportion of falls in elderly people are experienced while walking and, with advancing age, older adults are more likely to fall when they are engaged in concurrent tasks. Gait variability, particularly during dual-task walking conditions, may provide an objective measure to characterize impaired execution of gait, with greater variability placing older adults at increased risk of falling.