上星期跟诚诚打得实在太爽了，专业选手就是不一样，可以让我打得很舒服很受锻炼同时无懈可击的致胜球又让你心服口服。他也给了我几个建议，虽然从我深厚的理论基础来讲，意见还有所保留，但还是要注意几点：

一个人的爱好真的可以培养人很多的能力，今天为了研究怎样更高效的击球，我竟然要作图利用力学和运动学的知识去体验击球应该选择怎样的拍面角度！说起这个稍为专业的话题，就觉得气愤，国内只要是比较新的东西，都要去看国外的书籍，像国内的网球媒体，仅仅是限于怎样去买拍，赛事的一些报道，要了解专业网球运动知识，真是求学无门，我虽然不是什么职业球手，但是任何东西都想从系统和理论的高度全面深入去学习，譬如网球吧，为了更好的打球，你必须具备网球与力学运动学的交叉知识，球拍技术，还有网球的运动技能技巧，更深层的就是网球策略、网球技术，真的不知道阿加西和费德勒有没经过这么多的培训!

其实打网球，对中级球员来说，最重要的要旨除了是握拍方式之外（这里指的握拍方式不但指东方式、西方式等静态握拍方式，更有运动中调整的握拍方式、挥拍技巧和拍面角度选择），步法和全身整体运动的完美结合才是打出精妙网球的关键，这里有个很重要的原理：

                                                       拨浪鼓"原理
初学者击球最大的问题就是不会转肩,或者叫不会转体,不只是初学者,有些打了几年网球的人也是如此,他们击球时只是在挥动手臂而已,身体就象是一堵墙壁似的一动不动.你叫他转动肩部,扭动腰部,他也只是将手臂挥动得更快而已.这样做不仅打不好球还会带来很严重的伤病.
其实打球的原理很简单,想想"拨浪鼓"吧!
当你转动那面鼓时,鼓两旁的拴着的小球也会跟着转动;你将鼓转得越快,小球也会转得越快;把你的身体当作是那面鼓,你的手臂是球,当你转体时,你的手臂也会跟着转动;你的手臂越放松,就会转得越快;你的身体转得越快,你的手臂也就挥得越快.而这就是击球的全部秘诀
初学者们,忘记用手臂来打球吧!你的手臂无需格外加力,只要握住球拍和控制拍面就可以了,把发力的事交给身体吧.不过记住，一般击球的时候是要夹住大臂，让小臂挥动，手腕在击球瞬间也要跟小臂垂直，这样才能用到鞭打原理，球来了,把侧对球网的身体转成正对球网,手臂就自然的被带到身体前方将球击出.
注意1:手臂是被转体产生的力给"甩"到前方去的,而不是主动挥出去的,用心体会这个"甩"字. 想想波浪鼓吧，要先转体再击球，击球瞬间的加速度才是增加球速的要点，而不是纯粹高速转体。
注意2:要想顺畅的转体,就得先确立一个轴心,击球时重心放在那条腿上,就以那条腿为轴转体,也就是说,击球时要牢牢的站稳,不要左摇右晃的,这样转体击出的球才会稳定有力. 为了更好的转体，再击球之前双腿要微屈，这样像螺旋型的转体才有加速度，而且向上提拍的起到了上旋的作用，同时记住，击球的瞬间手腕才稍微收紧，而不是一直抓紧球拍，出手后要有随挥动作。

 

击球时转体不够，有时候用手臂击球；身体向前推的力度不够，打不出深度，有时手腕一直紧张状态，击球瞬间脱腕，击球点的选择掌握得不好造成击球拍面角度选择失误，球拍后提的预挥幅度不够大

 

籍着对网球的热爱，竟然一连几天都在研究网技，痴迷起来，连我自己都有点吃惊，下面就是我几天泡网的心得，也希望自己能在实际竞技的时候发挥出来。

1.一直以来我以为东方式握拍像握手那么简单，这种握法打久了，总觉得食指指节的地方麻木了，今天看了一个正手上旋的技术要点其中就要求要像以下握法，像食指勾住枪膛的手法，果然爽了很多，而且用半西的时候舒服了很多。

2.其实网球入了门之后，手法很关键，但是全身的协调性也很重要，尤其要掌握步法，开放式和关闭式都要用好，在这基础上把上旋大力抽球等技术练成是全身的运动，如下图，

东方式注重一个全身中心由后带动向前的借力；而西方或半西方式会利用步法带动由腿－腰－大臂－小臂－手腕的全身旋转

3.要注意用力学等物理学知识指导打球的各式风格和打法，譬如拍面接球时和地面角度的选择等。

Babolat在欧洲于1999年首次推出他们的Woofer technology, 接着把它们带进了2000美国公开赛. 初始，只有少数泥地专家像 Carlos Moya and Nicolas Lapentti采用这种在拍边有明显可见的双线标记的球拍。不久以后， Alex Corretja and Kim Clijsters 也挥起了Babolat.

In the Fall of 1999 Babolat came across a promising American junior player named Andy Roddick. After a first round loss at the U.S. Open Juniors, Andy switched to the Babolat Pure Drive Plus and proceeded to win the Eddie Herr and Orange Bowl tournaments. Since then, Andy Roddick has become the hottest new player on the ATP tour, winning back-to-back clay court tournaments in Atlanta and Houston. He was also the player to watch at the French Open and Wimbledon. Roddick's success (along with his personality, style of play and huge serve) has had a big impact on the popularity of the Babolat Pure Drive racquets. In fact, it's difficult not to see a Pure Drive or Pure Drive Plus at almost any professional tournament. There are over 30 ATP and WTA players using Pure Drive racquets (over a dozen in the Top 100), as of the 2001 US Open.

Interestingly, the Pure Drives aren't what most people would consider true player's racquets. They fit better in the 'tweener racquet category, which means they're stiffer, lighter, and more powerful than a traditional player's racquet. It also means they'll probably appeal to a broader cross-section of players.

We playtested the Pure Drive and its longer brother, the Pure Drive Plus for two weeks. Here are our purely candid（公正的）comments.

 

You may have heard the bridal saying, "something old, something new, something borrowed, something blue." Well, the Head Liquidmetal 4 fits this saying pretty well. The "old" comes from the concept and manufacturing process of the Liquidmetal 4. All Liquidmetal racquets are made in Austria, with the same high standards which players have come to expect from the company since the original Prestige racquets became world renowned. The "new" comes in the form of Head's latest technology, Liquidmetal. Developed by the California Institute of Technology (Caltech), Liquidmetal alloy（合金） has proven to be stronger than Titanium（钛）. Head has placed the Liquidmetal alloy in four locations (the silver areas visible on the racquet head) to create what it calls Total Sweetspot Construction (TSC). TSC is designed to increase torsional stability and extend the sweetspot out towards the 2, 4, 8 and 10 o'clock areas of the racquet head. With the inclusion of Head's proven Twin Tube technology, the Liquidmetal 4 borrows a technology which originally found great success in the Head Radical line of racquets back in 1995. As for the blue... well, one look at this racquet will clue you in to that one.

We strung our playtest Liquidmetal 4 with 17 gauge multifilament synthetic gut string at 59lbs. Our playtest was conducted over a three-week period, here's what we learned