이단평행봉 뒤 공중돌아 내리기 동작의 운동학적 분석

A Study on Kinematical Analsys of Back Ward Somer Sault Dismount Motion at the Asymmetrec Bars

&nbsp;&nbsp;In an attempt to investigate the difference between once and twice in back tumbling shown in the process of touching the down bar in girl&quot;s parallel bars in the field of heavy gymnastics, we selected three gymnastic girl players as subject, and analyzed them, by way of 16㎜ high-speed camela on the photography of 50 tram/sec.<BR>&nbsp;&nbsp;we came to a conclusion as follows;<BR>&nbsp;&nbsp;1. For a position change in the center of body, the distance of horizontla and vertical movement didn&quot;t make a great difference.<BR>&nbsp;&nbsp;2. For a speed change on the center of body, the turn around twice was not shown more rapidly than that once until becoming the stage of seperating hands from bar, and both of tumbling were shown fast at the them of landing, making a defective factors on scores.<BR>&nbsp;&nbsp;3. In the process of performing a great revolution in the bar called "Taecha", the angle of a shoulder joint did not maintain 180 degrees, making defective factors on scores.<BR>&nbsp;&nbsp;4. In the process of tumbling in the air, the angle of the main joint was not completely flexed in both revolution, making an unfavorable factors on scores.<BR>&nbsp;&nbsp;5. In the process of a great revolution in the bar, it look less time for a turn around twice than that once where as a certain pattern was not shown in the totally consuming time.