| Summary: | 碩士 === 國立臺灣師範大學 === 體育學系 === 95 === The speed of the volleyball spikes decides the power of the spikes. The key factor which affects the speed of hitting a ball mainly is based on the entire pendulum arm opportunity with to wield the arm speed. The technical of airborne spikes is that human body loses the pivot and utilizes the balance of body segments in the air to complete back-swing, turn-swing, and forward-swing and further complete spike arm and the body assumes a straight line when hitting a ball. It’s most difficult point of technical segment to control. Therefore, the purpose of this study is to investigate the parameters of the inter-coordination of suspend the arm opportunity, speed of wielding arm and the balance of upper body segment of the ace attack player and quick attack player.
Ten elite college volleyball athletes, 5 ace attack players and 5 quick attack players, are selected as observation objects. The examinees have to complete 3 successful spikes. A camera (Redlake 125Hz) was used to film two dimensions of spikes and a software (Kwon 3D) was adopted for analysis. Data were analyzed using SPSS 10.0. The research takes individual sample “t test” to accumulate and analyze the data correlations of the parameters of the hitting a ball of the ace attack players and quick attack players.
The main conclusion of this study is as following:
A. The percentage of timing action demonstrates that back-swing is lower that forward-swing, but using the faster swing speed to get the hitting timing and hit the ball at the best point.
B. The air spike of turn-swing and forward-swing action demonstrates that the effective action space tends to close.
C. The various articulations of swing arm could have function opportunity effectively and the articulations speed also can increase in turn. This action conforms to Kinetics Chain Theory.
D. Both spiking arms could complete the spike actions by crooking the arm but the variation of elbow articulation angles of non-dominant hand reaches the significant level, demonstrates that the using of non-dominant hand of ace attack players surpasses quick attack players.
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