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BackgroundGait impairment in Parkinson's disease (PD) occurs early and pharmaceutical interventions do not fully restore this function. Visual cueing has been shown to improve gait and alleviate freezing of gait (FOG) in PD. Technological development of digital laser shoe visual cues now allows for visual cues to be used continuously when walking. This study aimed to investigate the effects of laser shoe visual cueing on gait in people with PD across different disease severity (i.e., Hoehn & Yahr [H&Y] stages I-III) and FOG status.MethodsEighty people with PD (H&YI = 20, H&YII = 30 [15 FOG, 15 noFOG], H&YIII = 30 [15 FOG, 15 noFOG]) walked a 10 m straight path (back and forth) self-paced for 80 seconds without and then with laser shoe cues (participants were allowed 1-2 walks to familiarize with the cues). Inertial sensors were used to measure gait metrics. Laser cue line was set to usual step length for individuals based on their usual walk data from the inertial sensors.ResultsLaser shoe cueing did not improve gait in PD regardless of disease severity or FOG status. Across all groups, participants decreased gait speed (P P P P P P ConclusionDigital laser shoe visual cues do not improve gait in people with PD across disease severity or FOG status. Further investigation is required to examine different cue settings or exposure periods.
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