During the trial, each participant performs as fast as punch, the leg executes step toward onto the force platform and back to the starting position. Ground reaction forces (GRF) data is extracted by identifying an initial ground contact and take off time. GRF is analyzed by calculating braking impulse as the area under the force–time curve in the anteroposterior direction during the phase in which the anteroposterior GRF component displayed in a direction opposite to the direction of locomotion