| Summary: | 碩士 === 輔仁大學 === 體育學系碩士班 === 99 === The main purpose of this research was about the practical difference between grab and track start technique. Subjects were four male players who presented our country to participate in 5th East Asian Games and 16th Asian Games. Two of them were used to grab start, and the other two were track start.
The average age of subjects was 21.50±1.73 years old, the heights was 176.50±4.65 CM, the weight was 67.75±2.63 kilo grams and 13.75±1.71 years of training age. By recording the grab and track start movements of subjects with a high-speed camera (60Hz), and analyzed by a movement analysis software called Kwon 3D. This reliability and efficiency of sport science parameter has been examined by SPSS 12.0 For Windows and Pearson’s product-moment correlation coefficient. Descriptive Statistics was used to analysis (average and standard deviation) all parameters of sport science. With independent sample
t-test to examine any significant difference between two movement of starting techniques. The results as below:
1.Reliability and Efficiency : the consistency and stability of all sport science parameters of this research has been proved after analyzing by Pearson’s product-moment correlation coefficient (P＜.05).
2.Ready Position: the angle of hip joint was 33.26±9.85 degrees, 145.42±8.71 degrees of knee joint, postural vertical position was 71.75±5.46 cm and 11.96±3.93 cm of horizontal position of grab start technique. Track start technique showed 31.41±5.23 degrees of hip joint, 135.99±12.46 degrees of knees joint, postural vertical position was 67.96±2.68 cm and 18.57±6.06 cm of horizontal position. The significant differences were the angel of knees joint of ready position, vertical and horizontal of postural positions (P＜.05).
3.Angles of Jumping and Water Entry: by the parameters, the jumping angel of grab start technique was
-9.44±2.55 degrees, and 34.82±2.91 degrees of water entry. The jumping angle of track start technique was -6.71±4.03 degrees and 35.91±2.72 degrees of water entry. Only jumping angle showed significant difference (P＜.05).
4.Start Time: reaction time estimated was 0.20±0.04 seconds, action time was 0.61±0.05 seconds, jumping time was 0.81±0.09 seconds, flying time was 0.30±0.04 seconds and overall start time was 1.11±0.10 seconds of grab start technique. Track start technique estimated reaction time was 0.19±0.02 seconds, action time was 0.65±0.05 seconds, jumping time was 0.84±0.07 seconds, flying time was 0.31±0.03 seconds and overall start time was 1.15±0.07 seconds. There were significant differences of action time, jumping time and overall start time according to above research data (P＜.05).
5.Start Speeds: the speed of grab start technique jumping horizontal speed was 4.39±0.25m/s, jumping vertical speed was -0.52±0.44m/s, and 4.47±0.30m/s of jumping resultant speed. Entry horizontal speed was 4.22±0.45m/s, entry vertical speed was 3.58±0.57m/s and 5.34±0.70m/s of entry resultant speed. The speed of track start technique jumping horizontal speed was 4.33±0.14m/s, jumping vertical speed was -0.48±0.35m/s, and 4.34±0.19m/s of jumping resultant speed. Entry horizontal speed was 4.02±0.62m/s, entry vertical speed was 3.60±0.40m/s and 5.31±0.50m/s of entry resultant speed. There were significant differences of jumping horizontal speed, jumping resultant speed and entry horizontal speed according to above research data (P＜.05).
6.Flying Distance and All Postural Positions: the platform of postural horizontal distance was 1.16±0.04 meters; highest flying position was 1.15±0.06 meters; postural flying distance was 1.28±0.12 meters; vertical postural entry position was 0.55±0.04 meters and 3.27±0.15 meters of flying distance of grab start technique. The platform of postural horizontal distance was 1.23±0.05 meters; highest flying position was 1.09±0.08 meters; postural flying distance was 1.29±0.11 meters; vertical postural entry position was 0.56±0.04 meters and 3.23±0.17 meters of flying distance of track start technique. There were significant differences of the platform of postural horizontal distance and highest flying postural position according to above research data (P＜.05).
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