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DOI: 10.1097/00005768-199805001-00171
OpenAccess: Closed
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DISCUS THROWING PERFORMANCES AND MEDICAL CLASSIFICATION OF WHEELCHAIR ATHLETES

L. A. Mindock,John W. Chow

Kinematics
Shoulder girdle
Swing
1998
171 The purposes of this study were to (1) describe selected kinematic characteristics of discus throws performed by skilled wheelchair field athletes and (2) to identify those kinematic characteristics that are most closely related to the medical classification and measured distance of a throw. Two S-VHS camcorders (60 fields/s) were used to record the performance of 14 males of different classes. Each subject performed 10 trials and the best two trials from each subject were selected for analysis. 3-D kinematics of the discus and upper body segments at the instant of release, and the range of motion and average angular speed of different segments during the final forward swing were determined. The speeds of the discus at release, ranging from 9.9 to 17.2 m·s-1, were smaller than those exhibited by elite male able-bodied throwers. However, the angles of release, ranging from 24.6 to 41.4 °, were comparable to those observed in able-bodied throws. Of the segmental kinematic parameters, (a) the inclination and angular speed of the upper arm at release, (b) the ranges of motion of the shoulder girdle, upper arm, and forearm during the forward swing, and (c) the average angular speed of the shoulder girdle during the forward swing, were significantly correlated to both the classification and measured distance. The results suggested that athletes with high levels of spinal cord injury emphasized the elbow flexion to compensate for the deficiency in shoulder girdle movement. It was concluded that, in addition to the speed of the discus at release, the shoulder girdle movement during the forward swing is an important determinant of classification and measured distance.
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    DISCUS THROWING PERFORMANCES AND MEDICAL CLASSIFICATION OF WHEELCHAIR ATHLETES” is a paper by L. A. Mindock John W. Chow published in 1998. It has an Open Access status of “closed”. You can read and download a PDF Full Text of this paper here.