A study of some method of protecting damage of hamate bone at baseball hitting ; including connection with the batting skill

在本研究的主要研究中，我们以“手指握杆”的击球手为研究对象（正常握杆）和“手掌握杆”的击球手（将球棒的把手抓入击球手的手掌中）要知道以下两件事：1）击球手的钩骨钩与所抓球棒之间的距离; 2）当击球手击球时，施加在他的手掌表面上的压力，钩骨钩位于手掌表面之下，结果，我们看到，1）采用“手掌握”，钩和抓住的球棒之间的距离是10毫米。这大约是“手指握”的一半，2）采用“手掌握”，在击球的情况下施加到他的手掌表面的压力大约是“手指握”的两倍，以及3）在“手掌握”的犯规尖端的情况下，另外，通过求解球棒运动的运动方程，计算出增加的力量由双手对球棒进行高速拍摄的数据视频。因此，古巴和日本击球手的击球数据计算在这个表达式。此外，根据计算出的物理值，以及为比较而计算的其他指标，对两人的击球技术进行了比较。结果，澄清了在每个击球手的击球技术中，有一些差异可以定量地说。

In main study of this project we examined batters with 'finger grip' (a normal grip) and batters with 'palm grip' (grasping a knob of a bat into batter's palm) to know the following two things.1) the distance between the hook of hamate bone of the batter and the grasped bat2) the pressure applied to the surface of his palm, under which the hook of hamate is located, when the batter hits a ball, As a result we have seen that,1) employing 'palm grip', the distance between the hook and the grasped bat is 10mm. which is about half that of 'finger grip',2) employing 'palm grip', the pressure applied to the surface of his palm in the instance of hitting a ball is about double of that with 'finger grip', and3) in the case of foul tip with 'palm grip', the pressure applied to the palm is especially higher.In additional the motion equation concerning the movement of a bat was solved to calculate the power added to the bat by both hands from the data of a high-speed video shooting. So Cuban and Japanese batter's batting data were calculated in this expression. In addition, the batting skill of both was compared based on the calculated physical value, and other indexes that were calculated for the sake of comparison. As a result, it was clarified that in the batting skill of each batter there were some differences to speak quantitatively.