Clinicians, podiatrists and researchers have been quantifying foot posture and movement in various speed conditions and populations. Common variables to assess foot posture/movement are the Foot Posture Index (FPI-6), Achilles tendon angle (β), rear foot angle (γ) and longitudinal arch angle (LAA). These variables were frequently used in clinical and biomechanical settings. This study aimed to determine the relationship between the biomechanical variables (β, γ & LAA) in static and dynamic conditions and the clinically used FPI-6 and their redundancy.
Finding the most accurate way of quantifying foot posture and foot movement, especially about the subtalar axis to quantify pronation, has been the subject of many studies in the past. The precise quantification has been of interest due to the suggested association between an “abnormal” foot posture and impaired locomotion There is a variety of tools and methods available depending on the task and objective of the investigation. Foot posture has been quantified using foot print measures Due to the different methodologies and equipment used, comparing foot posture and movement across studies might be difficult to accomplish.
This study focused on the mid foot/arch and the rear foot posture in static conditions and their behavior during dynamic conditions, which have been investigated in the past years. A previous study, showed that two commonly quantified variables seemed to dominate the foot movement around the subtalar joint