金属バットと木製バットによる打球速度と打撃動作

概要

論文の詳細を見る
The purpose of this study was to compare differences in the performances between metal and wood baseball bats. Twenty senior high school baseball players hit the ball placed on a tee (tee-batting) 5 time each using metal bat and one wood bat with full swing. Batted ball speed immediately after impact, bat-swing speed just before hit and batting motion were measured using two high speed video cameras at 200 fps, and analyzed by DLT method. The metal (aluminum model) bat used in the present study was characterized by smaller moment of inertia and nearer COM to the grip end compared to wood bat. The average value of bat-swing speed by metal bat was significantly greater than that by wood bat. The individual values of bat swing speeds by metal and wood bats were correlated significantly each other, and the higher bat swing speeds produced the higher batted ball speeds in both metal and wood bats, suggesting importance of high bat-swing speed. In the correlation between batted ball speeds by metal and wood bats, it has been shown that the metal bat produced higher batted ball speeds than wood bat only when the batted ball speeds were high level. It was suggested from these results that the long hit by metal bat could be expected only when bat swing speed and thus batted speed was in the high level. In the bat swing motion, the hip and shoulder rotated simultaneously with metal bat, whereas with wood bat hip rotation was tended to get behind shoulder rotation. The rotational speeds at hip and shoulder were apparently faster in metal bat than in wood bat. These quicker swing motions with metal bat seem to be attributed to its relatively smaller moment of inertia compared to wood bat. These differences between metal and wood bats may give attention to the high school baseball players when they commute their bats from metal bat to wood bat in the future.
2005-03-31

金属バットと木製バットによる打球速度と打撃動作

スポンサーリンク

概要

著者

関連論文

スポンサーリンク