Comparison between Different Foot Types of Lower Limb Joint Kinematics and Kinetics during Counter Movement Jump Landing

Abstract

[Purpose] Lower limb kinematics and kinematic variables were compared with the aim of determining the differences in the loads experienced by the lower limb joints during Counter Movement Jump landing in normal- and pronated-foot groups. [Participants and Methods] Fifteen subjects were in the normal-foot group and 8 subjects were in the pronated-foot group. A 3-dimensional motion analysis system was used to measure Counter Movement Jump, and the data of the maximum jump height of three jumps was analyzed. The analysis items were the angle of the lower limb joint at landing, joint moment, power, and time until the joint moment reached its maximum value. [Results] The dorsiflexion angle of the ankle joint was significantly higher in the pronated-foot group than in the normal-foot group. The angle of hip abduction and the moment of internal hip extension were significantly lower in the pronated-foot group than in the normal-foot group, while hip power was significantly higher in the pronated-foot group. [Conclusion] The results suggest that the kinematic variables of the hip and ankle joints at landing may differ depending on foot type.