Ankylosing spondylitis (AS) is chronic inflammatory rheumatic disease which predominantly affects sacroiliac joints and spine and, during course of time, may also alter posture, movement patterns and regulation and quality of life. Clinical diagnostic tools for assessment of AS internalizations complement different qualitative and quantitative methods. Externalisations of axial skeleton alterations, followed by hip, knee, ankle and foot joints posture and movement adjustments, are quantified by conservative biomechanical approach. Items representing functional status and disease activity in AS patients correlated to pedobarographic status were anchored to previous research, i.e.