Document Type



The purpose of this study was to identify whether the value of stiffness during two-legged countermovement jump in dominant lower limb is similar to the one in non-dominant lower limb. The research was conducted on 35 basketball players. Each participant performed three countermovement jumps with arm swing to the maximum height. Measurements employed a two Kistler force plates and a BTS SMART system for motion analysis. Leg stiffness (understood as an inclination of the curve of ground reaction forces vs. height of the greater trochanter of the femur) was computed for these parts of countermovement and take-off phases where its value was relatively constant and forcelength relationship was similar to linear. Statistically significant differences were found during the comparison of the stiffness in the dominant and non-dominant lower limb.