Background and Purpose. Recent studies have concluded that measurements taken in subtalar joint neutral have poor interrater reliability. These findings have led to the exploration of different strategies of foot assessment, including a visual approach. Hence, the purpose of this study was to determine if the visual assessment protocol, which differentiates between foot type in a static position, was correlated to the measurements of foot motion in the mid-stance phase of gait.
Methods. Sixty-five subjects, between the ages of 18-35 years, were recruited for this study. Both feet of each subject were classified into foot type categories based on the criteria of the visual assessment protocol. The foot types consisted of excessively pronated, excessively supinated and neutral. The dynamic function of each foot type was collected with The MotionMonitorTM, a type of electromagnetic tracking device.
Results. A single factor analysis of variance (ANOVA) with repeated measures indicated there was a statistically significant difference (p = .0068) between foot types and the dynamic function of rear foot position. However, a post-hoc analysis using Student-Newman Keuis showed this difference was only between an excessively pronated or an excessively supinated foot type when compared to a neutral foot type.
Conclusion and Discussion. The visual assessment protocol, consisting of static measurements, was shown to be predictive of some aspects of dynamic foot function. This relationship was observed between an excessively pronated and supinated foot type, compared to a neutral foot type. Future studies should examine the inconsistencies and vagueness of the criteria used in the visual assessment protocol. Additionally, examiners should explore the validity of the method applied to quantify dynamic foot function. Lastly, the collection of dynamic data at various points of the stance phase may offer further insight into the relationship between static and dynamic foot function.
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