※ 引述《cmvct723d (working on)》之銘言： : ※ 引述《rr444 (earth scrap)》之銘言： : : correct, they teach you a up-to-down swing : : because we want balls having : : a back-spin effect afte hit by this way that makes balls go : : far and far. : : instead, by using down-to-up swing, the balls after hit with : : a fore-spin effect (like tennis or table tennis balls), : : they sink quickly. in other words, they are impossible : : out of the ballpark. : 異議~~~ : 我認為球的back/fore spin並不是因為由上往下揮擊或著是由下往上揮擊所造成的 : 主要原因是擊球點的問題 : 因為棒球與球棒都相當堅硬 : 互相接觸的時間跟網球乒乓球差太多了 : 幾乎是碰撞的下一瞬間就離開了 : 如果照你敘述所言 : 打者用up cut來揮球球不就是往前旋? : 高爾夫擊球不就是往前旋? : 並沒有這種現象阿 = = : 擊球點再心球的下方就會造成反旋 : 擊球點在球心的上方就是正旋 : 這樣比較符合現實的敘述 : 跟你怎麼揮棒是沒有正相關的 good point. back/fore spin is related to the place of the ball is hit as well as the way of swing. but i don't agree your statement exactly. maybe i don't make myself clearly and meslead you. i should say this way. if you can control to hit the ball at the smae place twice, first time hit the ball by up-to-down swinging and the second time by down-to-up instead. i believe, the flying distance in the first case will be farther than the second time because the back-spin effect. for golf, i don't know too much but based on my observation, it's more making sense this way. when i see a flying golf ball, it is almost no spin. that partly results from the way of swing. so the problem is if you can hit a golf ball by a baseball swing method and hit the ball in the same effort and at the same place when teeing ball, i believe the ball still can go further. : : you might make an excellent point but i am just too : : stupid to understand by your description. if you can : : provide me a pic of your training method, i think i can : : have more ideas and make correct comments. : : but in your description, i do find a toboo that most players : : try to avoid, but your teachers ask you to practice it - : : to straight your arms quickly during the motion of swing ( i might : : make a misjudgement because of too less information that : : you provide or that i can understand.) : : like "allen65535" pointing out in the "pushs", hitter's arms can't : : be straight before hitting the ball (maybe ok while hitting the balls). : : but to my standard, the best way is what "allen65535" said, " straight : : you arms in nanoseconds after balls are contacting the bats.", which : : generate the maximum bat speed during the ball is hit. : : do an experiment, after your straight your arms, unless : : you still can rotate your waist, the bat speed can't : : increase anymore and most of the time, it start decreasing. --

※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 160.39.202.183 ※ 編輯: rr444 來自: 160.39.202.183 (04/06 20:13)