The paper investigates the relationship between the foot contact time with the ground during the planting of foot phase and the horizontal and vertical velocities before take-off to determine an attainable height of jump during a jumping smash performance. World class badminton players were chosen as subjects. Results showed that contact time was found to be about 0.22 s to generate the greatest forward momentum and there was a greater need to convert the horizontal velocity to vertical velocity, as the vertical velocity determines the attainable height of jump.
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