This investigation was aimed at clarifying immediate effects of inclined and flat boards on the take-off motion of the high jump. Six male decathlon athletes were videotaped with three high‐speed cameras. Three kinds of boards were two tested, two upward‐inclination boards ( 3 and 5°) and a flat board (30mm high). The subjects performed pre and post jumps using their own techn-iques before and after use of each board to test their effects. There were no significant differences of velocity of the body and motion variables during the take‐off between pre and post jumps. However, in Subject N, desirable changes were observed in take‐off knee flexion and backward lean of the body after using 3° board. These indicated that there were no common immediate effects on take‐off motion of the high jump by the modified take‐off boards, but there have a possibility to be an effective training tool by using individually.
