Multidirectional walk test in individuals with Parkinson's disease: a validity study.Gait parameters of forward, backward, and sideways walk were studied when the participants walked overground in four directions at their self-selected speed and were compared with walking in the four directions on an instrumented GAITRite walkway. 
GAITRite
Multidirectional walk test in individuals with Parkinson's disease: a validity study.Gait parameters of forward, backward, and sideways walk were studied when the participants walked overground in four directions at their self-selected speed and were compared with walking in the four directions on an instrumented GAITRite walkway. 
GAITRite