※ 引述《cmvct723d (working on)》之铭言： : ※ 引述《rr444 (earth scrap)》之铭言： : : 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. : 异议~~~ : 我认为球的back/fore spin并不是因为由上往下挥击或着是由下往上挥击所造成的 : 主要原因是击球点的问题 : 因为棒球与球棒都相当坚硬 : 互相接触的时间跟网球乒乓球差太多了 : 几乎是碰撞的下一瞬间就离开了 : 如果照你叙述所言 : 打者用up cut来挥球球不就是往前旋? : 高尔夫击球不就是往前旋? : 并没有这种现象阿 = = : 击球点再心球的下方就会造成反旋 : 击球点在球心的上方就是正旋 : 这样比较符合现实的叙述 : 跟你怎麽挥棒是没有正相关的 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. --

※ 发信站: 批踢踢实业坊(ptt.cc) ◆ From: 160.39.202.183 ※ 编辑: rr444 来自: 160.39.202.183 (04/06 20:13)