JOKERDAVID

still available?

weight ?stiffness?

PM TO YOU

pm to you

PM TO YOU

Is it still available? and price?

pm to you!

Here are the steps to the topspin serve: 1. Stand sideways to the baseline. Let both racquet and ball-tossing arm move down a little together before they part to start the take-up. With your weight moving forwards over your bent front knee, swing the racquet down past your body and and turn your hitting shoulder well away as you release the ball (toss the ball a little higher above your front shoulder). 2. As you lean in, bend the racquet arm elbow bringing the racquet up. 3. Drop the racquet into the throwing position as the ball begins to fall. Keep the tossing arm up as long as you can, using it to track the ball. 4. Straighten your legs and at the same time your racquet arm, elbow, and wrist, throwing the racquet head up almost edge-on so that the strings bite the ball, brushing up and across it. 5. Snap the wrist forwards so that the racquet face strikes the ball a glancing blow from below. 6. Completing its up and across action, the racquet leaves the ball and arcs up and out to the right as the rear foot begins to swing across the baseline. 7. Follow through with racquet down past the right side. Your back foot will come down inside the court but not so far over the baseline as for the first service.

Below are a general series of steps needed to accomplish a well-hit tennis serve. They basically apply to all kinds of serves. 1. As you take the racquet back, the inside of your hitting wrist and the hitting face of your racquet should point towards the court surface at the end of the take-back. 2. Push your front hip forwards as you move your weight over your bent front knee, thereby stabilizing your front foot. 3. The back shoulder must turn in to add its power to the hit as the racquet head is thrown up to meet the ball. It is very important to time the shoulder turn. Turning the hitting shoulder too early or too late will result in an ineffective tennis serve. 4. Keep your head up with your eyes on the ball at all times. At the hit the wrist should snap forwards to present the strings to the back of the ball, with an up, through and over action. Be careful not to baby this shot, so to speak. Hit the ball with authority. 5. During the follow through, let the racquet go past your left leg (or right leg, if you're left-handed) as your momentum carries you forward onto your right foot which has swung through across the baseline.

在我生涯中的这一阶段，我大部分的击球都出自于自觉。我无法精确地解释我是如何做到的，这也包含发球在内。 当我要重重的发出一球时，我的目标在于发出Ace。偶尔，我的发球状况的确很好。有一次就发生在1995年美国网球公开赛决赛的第三盘，当时我的对手是 Andre Agassi（阿格西）。我对着网坛的最佳接发球者连续发出了四个Ace。也许你可以把这么好的状况比喻成一位投手在一局里，连续三掷三位打击手。这并不常发生--在我的生涯中只不过出现过四或五次。然而，当我发得很好的时候，落球点距发球线不到两英寸，那我要保住发球局通常都没什么困难。 以下是你可以运用在发球上面的一些关键要领： 1、发球要变换。 面对任何人，特别是像Agassi那种很善于回发球的人，我试着每一次都发在不同的地方——要不然的话，他终究可以接得上来。我试着让球落于不同的点。 2、不用做过分的尝试。 当我试着过度发球时，我就会碰上麻烦。当我试着使球落点离发球线很近的时候，我就会过度击球，然后我的发球就会挂网或太长。 3、保持放松。 当我进入良好的韵律时，我不会有过度的动作。没有强迫，只是自然的动作。那就是发球的理想方式：放松、变换落点、利落的击球。 4、身体前倾并上跃 在一场比赛的重要一分当中，我一直提醒自己要把球抛在前面并向上对球爆发力量。当我回转并击球时，我的身体应该伸直并朝一个角度进入球场。上跃的动力来自双腿。寻找理想的抛球点来自重复的练习，有时候好的抛球与坏的抛球只是一线之隔，特别是当比赛充满压力的时候。当抛得太后面的时候，我可能会发的太长。当我抛得太前面的时候，我的发球可能挂网。当抛球太低的时候，我也有可能打不到球，要不然就是球进，但力道不足。抛球位置要能够让你在上跃时击球并且击球时的身体完全伸直且进入球场。

归根到底，这就是击球手感和击球表现之前的博弈。哪个对您来说最为重要呢？ 有弹性的球拍 • 由于球拍有较大的偏差，力量损耗会更大 • 给球更少的力（有人称其为“死球”感） • 振动更大，频率更高 • 给您更好的舒适感（因为冲击小了）和控制感（因为力量小了） • 更好的球感-有些球员称其为“独揽球” 较硬的球拍： • 减少球拍的偏差，从而减少力量的损耗 • 给球更多的力（有的选手称其为“干脆”感） • 更少的振动，高振动频率 • 较差的舒适感（冲击大） • 击球更干脆，力量更大 手感：一般来说所谓的击球感就是击球瞬间手感知的震动强弱。硬的拍子在击球是形变小，球拍上的震动都转移到了手上，被肉吸收而球拍则没有产生形变，因而在出球的时候没有拍子的复位，所以就没有那种感觉。而软的拍子会因为击球而产生形变，并因为这个形变产生整只拍子上因为复位而造成的来回震动，所以感觉更能兜住球，也就有了所谓的击球感。不过对于硬的球拍，打到甜点的时候，也是能感到击球感的，打不到就会感到很硬很板的感觉。

Materials Nylon - synthetic gut or nylon? Truth be told, synthetic gut is nylon. In fact, most of today’s “performance synthetics” are constructed of nylon, albeit a higher grade than basic nylon string. Today’s manufacturing processes produce nylon strings (or synthetic gut, if you insist) that provide a good combination of playability and durability. In the old days (wood racquet era), any self-respecting player used natural gut. Nylon was so bad that only beginners used the stuff. Today, 98% of non-professional players use nylon strings. It’s that much better. Other string materials include: Natural Gut - the ultimate in playability and feel. Often overlooked due to it’s cost, natural gut is the best choice for players with arm problems or those who simply want the best. Formerly, the number one choice of ATP and WTA tour players. Now used more in hybrids, combining polyester mains with natural gut crosses. Natural gut gut offers maximum feel and control due to it’s low dynamic stiffness, which provides better ball “pocketing”, and a slight texture that provides more ball grab for enhanced spin. Polyester - a very durable string designed for string breakers-not much power or feel. Polyester strings became very popular with ATP players, because it provides added durability, doesn't move and "deadens" the stringbed. While this isn't a desireable feature for most recreational players, it is for many of todays ATP and (some) WTA players. They're bigger, stronger, swing faster and use more powerful racquets than players from the past. Often used in hybrids, combining polyester mains with softer synthetic or natural gut mains. This offers the durability benefits of polyester, while reducing the stiff, dead feel. Also easier to string than 100% polyester. Not recommended for beginning players or players with arm injuries. Kevlar - The most durable string available. Kevlar is very stiff and strings up very tight. Therefore, it is usually combined with nylon to reduce the string bed stiffness (Kevlar main strings, nylon cross strings). Still, Kevlar hybrids are the least powerful and least comfortable strings currently available. Players trying kevlar hybrids for the first time (from nylon strings) are recommended to reduce tension by 10% to compensate for the added stiffness. Not recommended for beginners or players with arm injuries.

[i=s] 本帖最後由 JOKERDAVID 於 2012-7-14 22:08 編輯 [/i] Price around $1,000 depends on quality Preferred >90% new Please pm me if you are interested

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How about HKD1000?