Foot Posture Index (FPI-6)

A normal Foot Posture Index (FPI-6) score ranges from 0 to +5, indicating a balanced foot posture without excessive pronation or supination. This suggests the foot maintains a neutral alignment, distributing weight efficiently during standing and movement. Scores outside this range may indicate a need for further assessment and possible intervention.

The six criteria assessed in the Foot Posture Index (FPI-6) are talar head palpation, curvature above and below the malleoli, calcaneal inversion/eversion, talo-navicular joint (TNJ) congruence, medial longitudinal arch height, and forefoot abduction/adduction. Each criterion is scored from -2 to +2, helping to classify the foot as supinated, neutral, or pronated.

In foot and ankle research, the Foot Posture Index (FPI-6) is widely used for assessing foot posture. To use the FPI-6, a healthcare professional observes a patient’s standing foot posture while they are in a comfortable stance position. Each of the six criteria is assessed and assigned a score, which is then summed to classify the foot posture as supinated, normal, or pronated. This information helps identify foot type, assess risk factors, and guide treatment decisions in clinical settings.