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Measuring the Coefficient of Variability in Marching-In-Place Test Using OptoGait System

Scott Grogan, MaryAnne Harrington, Drew Schwartz, Sepehr Zandi

The purpose of this study is to determine normal variance percentages using Microgate OptoGait’s marching-in-place test in a normal, asymptomatic population. By collecting data from a normal population, we can establish a set of normal values. Knowing what is normal for a patient can then be applied to the patient that experiences an injury. Catena and Donkelaar showed us that a person experiencing a concussion later presents with a change in their gait, showing more asymmetrical patterns (1). A similar study was done with stroke patients in the Journal of the American Heart Association (2). They demonstrated that damage to the posterolateral putamen in chronic stroke patients, caused a temporal gait asymmetry. Other researchers have looked at other factors of gait including, velocity, endurance, distance, and oxygen consumption, but few have looked at the asymmetry of marching as in the aforementioned studies (3-6). The OptoJump system, from which OptoGait was derived has proven to be a reliable optical assessment system, used for analyzing vertical jump, strength, speed, time, and asymmetry (7,8).

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