不同材質棒球及不同投球動作速度之比較分析研究

Comparisons between Speeds of Different Types of Pitching Baseballs Made of Various Materials

李明憲(Ming-Shain Lee) ； 林育田(Y. T. Lin) ； 郭紘嘉(Den Kuo) ； 楊文添(W. T. Yuang) ； 倪兆良(Chao-Liang Ni)

《大專體育學術專刊》 92年度 (下) (2003/06) Pp. 449-459

https://doi.org/10.6695/AUES.200306_92.0112

摘要

We study different types of pitching baseballs, which were made of various materials. The major roles are six pitchers of baseball team of Kuang Wu Institute of Technology. Their average age is 20.17 ± 1.47 years old, average height is 176.67 ± 6.62 cm, and average weight is 74.1 ± 9.00 Kg. The speeds of pitched baseballs were measured by speed measurer. The collected data were analyzed by SPSS software and the two samples were studied by the t-test statistical analysis. The results are shown in the following.1. The speeds of type 1 hard straight ball and soft straight ball are respectively 119.48 ± 5.32 and 117.23 ± 6.17 Km/hr. The value of t-test is 4.40*(p＜0.05), so the two samples are obviously different.2. The speeds of type 1 hard curve ball and soft curve ball are respectively 94.4 ± 6.97 and 114.77 ± 6.70 Km/hr. The value of t-test is 4.21*(p＜0.05), so the two samples are obviously different.3. The speeds of type 2 hard straight ball and soft straight ball are respectively 118.60 ± 6.97 and 114.77 ± 6.70 Km/hr. The value of t-test is 3.93*(p＜0.05), so the two samples are obviously different.4. The speeds of type 2 hard curve ball and soft curve ball are respectively 91.38 ± 8.68 and 90.35 ± 10.85 Km/hr. The value of t-test is 0.90 (p＞0.05), so the two samples are not obviously different.5. The speeds of type 1 hard straight ball and type 2 hard straight ball are respectively 119.48 ± 5.32 and 118.60 ± 6.97 Km/hr. The value of t-test is 1.67 (p＞0.05), so the two samples are not obviously different.6. The speeds of type 1 soft straight ball and type 2 soft straight ball are respectively 117.23 ± 6.17 and 114.77 ± 6.70 Km/hr. The value of t-test is 3.25*(p＜0.05), so the two samples are obviously different.7. The speeds of type 1 hard curve ball and type 2 hard curve ball are respectively 94.40 ± 7.92 and 91.38 ± 8.68 Km/hr. The value of t-test is 3.32*(p＜0.05), so the two samples are obviously different.8. The speeds of type 1 soft curve ball and type 2 soft curve ball are respectively 89.52 ± 10.28 and 90.3 ± 10.85 Km/hr. The value of t-test is -0.85 (p＞0.05), so the two samples are not obviously different.For various materials, hard balls are faster than soft ones, regardless of pitching types. Moreover, type 1 is superior to type 2, for hard straight, soft straight balls, and hard curve ball. Therefore, pitchers should utilize type 1 in case no runner in the field bases because it is more powerful in speed.

關鍵字

投手 ； 揮臂式投球 ； 固定式投球

並列摘要

We study different types of pitching baseballs, which were made of various materials. The major roles are six pitchers of baseball team of Kuang Wu Institute of Technology. Their average age is 20.17 ± 1.47 years old, average height is 176.67 ± 6.62 cm, and average weight is 74.1 ± 9.00 Kg. The speeds of pitched baseballs were measured by speed measurer. The collected data were analyzed by SPSS software and the two samples were studied by the t-test statistical analysis. The results are shown in the following.1. The speeds of type 1 hard straight ball and soft straight ball are respectively 119.48 ± 5.32 and 117.23 ± 6.17 Km/hr. The value of t-test is 4.40*(p＜0.05), so the two samples are obviously different.2. The speeds of type 1 hard curve ball and soft curve ball are respectively 94.4 ± 6.97 and 114.77 ± 6.70 Km/hr. The value of t-test is 4.21*(p＜0.05), so the two samples are obviously different.3. The speeds of type 2 hard straight ball and soft straight ball are respectively 118.60 ± 6.97 and 114.77 ± 6.70 Km/hr. The value of t-test is 3.93*(p＜0.05), so the two samples are obviously different.4. The speeds of type 2 hard curve ball and soft curve ball are respectively 91.38 ± 8.68 and 90.35 ± 10.85 Km/hr. The value of t-test is 0.90 (p＞0.05), so the two samples are not obviously different.5. The speeds of type 1 hard straight ball and type 2 hard straight ball are respectively 119.48 ± 5.32 and 118.60 ± 6.97 Km/hr. The value of t-test is 1.67 (p＞0.05), so the two samples are not obviously different.6. The speeds of type 1 soft straight ball and type 2 soft straight ball are respectively 117.23 ± 6.17 and 114.77 ± 6.70 Km/hr. The value of t-test is 3.25*(p＜0.05), so the two samples are obviously different.7. The speeds of type 1 hard curve ball and type 2 hard curve ball are respectively 94.40 ± 7.92 and 91.38 ± 8.68 Km/hr. The value of t-test is 3.32*(p＜0.05), so the two samples are obviously different.8. The speeds of type 1 soft curve ball and type 2 soft curve ball are respectively 89.52 ± 10.28 and 90.3 ± 10.85 Km/hr. The value of t-test is -0.85 (p＞0.05), so the two samples are not obviously different.For various materials, hard balls are faster than soft ones, regardless of pitching types. Moreover, type 1 is superior to type 2, for hard straight, soft straight balls, and hard curve ball. Therefore, pitchers should utilize type 1 in case no runner in the field bases because it is more powerful in speed.

並列關鍵字

pitcher ； the windup position ； the set position