The research focuses on studies of biomechanical parameters of lower limbs for the insight regarding movement character and changes of involved body parts. The aim is to quantify changes of leg measures during climbing posture. 150 workers were scanned using 3D anthropometrical scanner Vitus Smart XXL® in standard stand and step-up posture . Primary body characteristics for trouser size definition  served for grouping the participants into size groups. The ability of representatives of a one-body-height group to take the dynamic posture was analyzed. Sets of measures were obtained for the analysis of changes in particular parts of lower limbs.