Kinesiology Department, Boise State University, Exercise Studies at Lander University, Boisie, ID 83725-1710, USA.
Res Q Exerc Sport. 2011 Jun;82(2):220-8. doi: 10.1080/02701367.2011.10599749.
A developmental description of overarm-throwing characteristics of U-14female ASA softballplayers is presented here. Comparisons were made between these athletes and teens of similar age in the United States (Runion, Roberton, & Langendorfe 2003) and in Germany (Ehl, Roberton, & Langendorfer, 2005). A majority of the softball players demonstrated the most advanced developmental levels for the backswing foot, humerus, and forearm components. Seventy percent (n = 26) demonstrated a Level 2 trunk, while 30% (n = 11) demonstrated a differentiated trunk, Level 3. The average throwing velocity was 62.58 ft/s (19.07 m/s). Comparisons were made to girls with less throwing experience in the United States (Runion et al.) and Germany (Ehl et al.); the softball players threw with greater velocity (9.12ft/s [2.77 m/s]and 15.89 ft/s [4.84 m/s], respectively) and demonstrated superior trunk, humerus, and forearm actions. The boys from both countries threw the ball faster than the softball players. Significant chi-square analyses found the softball players had superior humeral actions (Level 3) compared to the German boys and superior forearm actions (Level 3) compared to both groups of bays. Experience seems to have an impact when comparisons among girls are made; yet, explanations for differences seen between boys and girls still remain unclear and warrant further research.
本文呈现了 U-14 女子 ASA 垒球运动员上手投掷动作的发展描述。这些运动员与美国(Runion、Roberton 和 Langendorfe,2003 年)和德国(Ehl、Roberton 和 Langendorfer,2005 年)的同龄青少年进行了比较。大多数垒球运动员在挥臂脚、肱骨和前臂部分表现出最先进的发展水平。70%(n=26)的运动员表现出 2 级躯干水平,而 30%(n=11)表现出 3 级分化躯干水平。平均投掷速度为 62.58 英尺/秒(19.07 米/秒)。与美国(Runion 等人)和德国(Ehl 等人)投掷经验较少的女孩进行了比较;垒球运动员的投掷速度更快(分别为 9.12 英尺/秒[2.77 米/秒]和 15.89 英尺/秒[4.84 米/秒]),并且表现出更好的躯干、肱骨和前臂动作。来自这两个国家的男孩比垒球运动员更快地投球。显著的卡方分析发现,与德国男孩相比,垒球运动员的肱骨动作(3 级)更好,与两组男孩相比,前臂动作(3 级)更好。当比较女孩的经验时,似乎会产生影响;然而,男孩和女孩之间差异的解释仍然不清楚,需要进一步研究。