Brigham, Robert J.||Healey, William Albert
M.S. (Master of Science)
Department of Physical Education
Gymnastics; Horizontal bar
Purpose. The purpose of this study was to analyze the Eagle giant circle by the use of cinematography, and secondly, to discover the factors necessary for the correct execution of this giant circle. Procedure. A Paillard Bolex 16 mm. camera was used to photograph four gymnasts while they performed the Eagle giant circle at least three times in succession. A grid system consisting of a wooden frame divided into sixteen equal parts (four, four foot squares) was placed in view of the camera to serve as a scale object and a reference point when tracing the films. The tracings were made by projecting the film through a Recordak Machine on to Polar Coordinate, Form M-3 graph paper. Each performer was filmed separately and the best performance as designated by a jury of experts was selected for tracing. The similarities and dissimilarities of each performer's execution of the Eagle giant circle was analyzed and summarized from these tracings. Conclusions. Definite patterns of movement exist among successful Eagle giant circle performers. Analysis supported the following conclusions: 1. There is a sharp head action (head flexion) on the down swing and should be achieved by the 90 degree mark. 2. The body should be straight and stretched as much as possible by the 90 degree mark. 3. The body should be arched between the 90 degree - 180 degree marks. 4. Hip flexion should begin at approximately the 220 mark. 5. The head should be extended at the time of hip flexion. 6. The shoulders should lead the body at the conclusion of the movement.
Ettl, Conrad J., "A cinematographic analysis of the Eagle giant circle on the horizontal bar" (1967). Graduate Research Theses & Dissertations. 73.
Northern Illinois University
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