@article{oai:nagoya.repo.nii.ac.jp:02005200, author = {山本, 裕二 and Yamamoto, Yuji and 池上, 康男 and Ikegami, Yasuo and 桜井, 伸二 and Sakurai, Shinji}, issue = {1}, journal = {総合保健体育科学, Nagoya Journal of Health, Physical Fitness & Sports}, month = {Mar}, note = {Three baseball batters served as the subjects in an examination of the coordinative structures of movements of the bat and body in response to the different spatial locations of a pitched ball. The movements involved in hitting the ball were recorded by two cameras, and analyzed using 3-D kinematics. Although there was no difference in the downswing movement time for the two sides, the peak angular velocities of the bat for in-side hitting were significantly greater than for far-side hitting for all subjects. It suggests that the phase structures of the striking action had invariant characteristics. However, the downswing was not an invariant movement; instead, the swing was continuously adjusted until the moment of ball/bat contact. This was accomplished by changes in the position of the batter's entire body, from the lower to the upper extremities. This result suggests that temporal hierarchy of coordinative structures would control the striking action corresponding to the environmental diversity.}, pages = {23--30}, title = {環境の多様性に対応する打動作の協応構造}, volume = {25}, year = {2002} }