https://webptt.com/cn.aspx?n=bbs/swim/M.1330016064.A.518.html 作者: opgy (opgy) 看板: swim 标题: Re: [问题] 游泳翻转与踢墙 时间: Fri Feb 24 00:54:22 2012 ※ 引述《Rose001 (公牛)》之铭言： : 恕删....原地翻转都OK了~(虽然翻完还是会稍微往左偏个5~10度) : 但是配上短距游泳快到墙了 : 我翻过去都还是踢不到墙 踢不到墙...你是指翻滚後在水中失去方向感,没法子准确的把脚掌放在墙上吗? 我刚开始练习时也是一翻马上天旋地转,不知道池壁在哪 现在回想起来大部分原因该是我翻地不够乾脆果断造成的 一方面是因为我近墙时因害怕而减了速 另一方面则是我翻滚时的团身不够紧凑 除此之外还有一种原因会让你踢不到墙,就是翻的时候距离墙壁太远了 不过看你下面的叙述,应该不是这个造成的 : 而且已经很近了 : 就是站着手都几乎摸到墙了 : 再往前一点的话几乎就是我头要撞到墙壁才翻 : 心里怕怕的而且感觉一定是有地方错了 : 翻的距离也太奇怪了 : 请问我哪个地方有错?? : 抱歉没有办法附上影片因为我都自己游QQ 建议你去看下面GoSwim拍的系列影片,多练多想 前面你说你已经会原地翻滚了,那Step #1，2自不消说,从3看起吧 --------------------------------------------------------------------- Swimming - Freestyle Flip Turn Step #3 http://youtu.be/fHXNBbLFiJs 影片中重复再重复的重点:在翻滚过程中不要用手去帮助翻滚 如果你还在用手乱甩画圈辅助定位,就回 Step #2 影片 1:50 处的示范动作重头练起 Swimming - Freestyle Flip Turn Step #2 https://www.youtube.com/watch?v=ryN-4R1E8d8 手乱画圈在初学的人身上很常见,这里利用 noodle 教你在转身时手应在什麽位置上 另补充一点,关於道具 noodle , 如果手边没有这玩意 可拿两块浮板或者pullbuoy(俗称夹脚板or八字板,浮球等等)来代替 更阳春的方法是拿两个饮料宝特瓶来代替,主要是这些道具都有浮力 目的就是利用浮力来教导你於滚翻开始时手该在的位置,以利後续动作进行 等你习惯了就可以拿掉了 练成这几部分後你再去练Step #4，5 --------------------------------------------------------------------- Step #4 应该就是你目前在跑的进度,但你在这里出了大问题 建议你回头去练好上面的影片再回来挑战会比较实际 而当你一步步练下来都没问题了,剩下的就是蹬墙出去要注意的细节了 Swimming - Turns - Freestyle Flip Turn Step #5 http://youtu.be/Ss6-htcF9mA 注意花色泳衣示范者的脚放在墙上时两脚掌位置并不是完全水平的 有个一上一下的小错位(呈侧角度踩壁),当她蹬离池壁时,两脚的错位角度 将有助於她在後续的水下蝶腿过程中侧向转动身体,转成脸朝下,背朝上的俯卧姿势 为了练好这点,你可以从池边蹬壁分解开始练起,开始时一手抓在岸上,试着把脚 放在墙壁上,脚趾朝10点钟或者11点钟方向，而不要直着朝上,记好脚在此位置上 的感觉,接着放手蹬离池壁,不要用背部朝下完全水平的仰姿蹬离, 而是稍微侧一下身体,以有点小侧身的仰姿蹬出 仰姿蹬出打水下蝶腿的过程中,侧向去转动身体直至背朝上为止,此侧转角度约180度 除此之外,还有一种flip turn是在蹬壁时身体就已完成侧转约90度 蹬出的水下打腿过程再接着转剩下的90度,索普的示范影片就是如此 不过影片只有示范没有教怎麽练,想学这套的需自行摸索研究 https://www.youtube.com/watch?v=O-q7i-5HsjM --------------------------------------------------------------------- 最後说一下我练习时的一些经验 其实也都是一些老生常谈,爬爬文就能看到很多 1.游近池壁不要减速,而是要把速度给提起来,最好有多快你就游多快 2.在T线前计画好最後一次换气,过T後就不要再换气了 3.在T线前要想好剩下几划,不要多划也不要少划 划多了会让你离墙很近(亦即太晚进行翻身),你翻过来脚掌触壁时,你的身体 却还未成水平,姿势会变成脚在上而头手却指向下,造成你蹬出时朝向池底而去 若是少划了,此时你离墙太远,翻过来脚还要伸直才蹬得到壁,如此反应时间过慢 而蹬墙的力道也不足(也就是你翻得太早了),若错估距离甚至有可能蹬不到墙 这需要多练习去找到最适合你的划数,我看阿兜仔选手的示范影片几乎都是过T线 只一划就翻了,而我自己是过T线後最多两划就得翻,否则就晚了 4.翻滚要有把脚跟往岸边磕下去的觉悟 一旦翻滚了就不要拖泥带水,要果断要迅速 当然,用把脚跟朝岸上磕下去来措辞是有点夸张,但这种觉悟在团身的思想准备上 是有帮助的 为了不把脚跟磕在岸上伤筋动骨破皮流血,你在翻的过程中势必会记得要紧紧团身 以缩短翻过去後,脚与墙的距离 而紧紧团身这点是你在快速完成翻滚的一个重点要素,一定要做好它 团身越紧你翻滚过去的速度就越快 其物理原理跟溜冰表演的转身以及高台跳水的转身是一样的: 因为角动量守恒,所以你越是懂得收缩身体,紧紧团身 使对质心的转动惯量变小，则身体相对於质心的转速便会加快 5.翻滚过程中团身要紧凑 再次强调这一点,而你可以藉由多练习水中原地翻跟斗 来记住那种感觉 6.从离池壁远的地方练起 此後再慢慢移近找最适合的距离,不要一开始练就离壁很近 脚跟朝岸上硬砸下去可是有真实案例的 https://webptt.com/cn.aspx?n=bbs/swim/M.1232160183.A.D09.html 7.翻滚完成迅速舒展身体 亦即当你把脚掌放到墙上的同时,双手立刻交叠成流线形 8.上半身成流线型後立刻蹬出...开始享受无氧地狱...直到出水... 最後一点是翻滚时鼻子要记得喷气以免呛水 新手不习惯学不会的可先上鼻夹暂作辅助,熟练动作後再拿掉继续努力 ========================================================================== 如果速度够快,细节都有做到,一翻滚完上身伸展两手交叠完成脚掌就在墙上了 很神奇的...可惜我就只有那麽几次能有这种感觉..需要多练习啊 --

※ 发信站: 批踢踢实业坊(ptt.cc) -- Flip Turns Freestyle and backstroke are the two variations of flip turns. Done correctly,they speed up a swimmer while allowing a brief respite from swimming, thus explaining why short-course times are faster than long-course times for the same events. 1.Freestyle Approach Unless swimmers take a lot of momentum into the wall, they will not take much off of it. The approach is crucial to maintaining speed; any hitches, pauses, or stops are deadly against good competitors. The turn should be seamless and fast. ◆Use attack mode. Swimmers need to attack the wall; this is an attitude as much as a technique. They should not breathe the last two strokes into the wall. ◆Keep your eyes on the cross. Swimmers should keep their eyes on the cross on the end of the pool for precision. Many coaches prefer to have their swimmers focus on the T on the pool bottom. But given the differences in water depth and clarity from pool to pool, swimmers can time their turns more precisely by focusing on the wall. The slight loss in streamlining is made up for by the improved timing. ◆Gauge for a full stroke. Fast in, fast out. Gliding in or chopping the last stroke into the wall kills momentum just when swimmers want to be moving full speed ahead. Instead, they should gauge their strokes into the wall from several strokes out so that they can finish with a strong, full stroke with hands at their sides. Any necessary adjustments in stroke length are spread out over several strokes rather than concentrated on the last one. 2.Freestyle Turn on the Wall For a flip turn, the turn on the wall consists of somersaulting and planting the feet on it for the push-off. Quickness is crucial. ◆Do the quad. For a fast somersault, four things need to happen quickly all once: Duck the chin, dolphin-kick powerfully, tuck at the middle, and back-scull with both hands toward the face. The quad gets the feet over and on the wall quickly. The body should be a small spinning ball in a tuck position, not a layout. ◆Plant and go. The legs flip straight over on the somersault, and the feet plant on the wall with the toes pointing upward. On the wall, it’s one touch and go.There is no twisting and turning on it, and there is no waiting to turn over onto the stomach before pushing off. Instead, swimmers get off the wall as fast as they can and worry about twisting after they push off. They should not add any extra motions that take time and slow them down. 3.Freestyle Send-Away The send-away takes the speed from the somersault and adds the power of the push-off and the underwater kicking. Underwater dolphin kicking is an important weapon in the arsenal of most top swimmers. ◆Explode. The push off the wall is powerful, with a straight back and taut body—no sogginess. ◆Streamline. The head is tucked tight against the upper arms, the elbows are squeezed tight, and the hands are placed one on the other. The swimmer resembles a skinny sharpened pencil coming off the wall. ◆Use hyperspeed. Small, powerful, quick dolphins, working both beats of each kick, are more powerful and streamlined than big, slow dolphins. Every kick from first to last must be powerful. One common mistake is for swimmers to start strong but get progressively weaker until they are almost motionless by the last kick. Underwater dolphins on the send-away are becoming important even with age-groupers, especially in short-course yards racing. Age- groupers must practice this skill. ◆Break out. For most swimmers, the first two breakout strokes are wimpy giveaways. This wastes an opportunity to carry the speed from the push-off and underwater dolphins into the swimming. After a freestyle turn, swimmers should always pull with the bottom arm first (this may not be the arm whose hand is on the bottom), and they should make the breakout strokes long, strong, and powerful, causing the body to surge forward and setting a good rhythm for the length. Never breathe the first two strokes (or more, for short races) since effort and momentum are wasted by climbing upward to breathe. ※ 编辑: opgy (36.231.18.124), 10/19/2016 13:35:18