Abstract
Reliability of center of pressure measures of gait initiation time in healthy older adults: Effect of obstacle negotiation and cognitive load on reaction and anticipatory postural adjustment phases
Highlights
Gait initiation (GI) is a voluntary destabilizing behavior that is a sensitive indicator of dynamic postural stability [1,2]
The anticipatory postural adjustment phase (APAP) showed good to excellent reliability in related conditions; single task condition on the smooth (ICC=0.79, standard errors of measurement (SEM)=0.04) walkway and obstructed walkway (ICC=0.65, SEM=0.04) and when dual tasking on the smooth and obstructed walkways [(ICC=0.73, SEM=0.04) and (ICC=0.81, SEM=0.03), respectively
We found good to excellent reliability for reaction and anticipatory postural adjustment phases
Summary
Gait initiation (GI) is a voluntary destabilizing behavior that is a sensitive indicator of dynamic postural stability [1,2]. GI provides insight into postural control and biomechanical changes related to aging and identifies fall risk in older adults [2,3,4,5]. From the pre-crossing phase, foot placement requires more cognitive involvement compared to walking on an unobstructed walkway [10]. Dual-task paradigms are used to evaluate interactions between cognition, gait, and fall risk. Since GI requires higher cognitive resources compared to steady walking, it has been shown that the increased duration of APAs in GI while dual-tasking is associated with increased risk of falling in older adults [11,12]. The duration of APAs under dual-task conditions is a sensitive indicator of dynamic balance efficiency in GI [1,13]
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