周易兄，以下就是你在博文上有关Flat Left Wrist 的疑问。

Homer在他书中写的 “平左手腕” ，为什麽 “平” 一字，他要用引号呢。其实他的意思是说 “平” 是个人的看法，例如当我们推杆的时候。或如果我们是中底(Mid Sole)式打法等等。

平左手腕，是在高尔夫挥杆工程学内的第一个最重要的定位 (在Preface内的第二段)，其实原因就非常简单。

Homer说过，我们的最大半径是由足低到杆头，但如果我们以简单”几何”来看，可看成为从左肩到杆头(在击球一刻)。而我们的最低点是在左肩的直下。

一枝一号木杆，大概是四十五寸，而越长的杆身就能另我们打得越远。有些人打得不远，最大的原因是他们的手腕状况(挑起的曲手腕) ，加上角度动力不足，而引至不能产生高速的球杆头速度。

大家都知到，如果我们把球杆挑起地挑高我们的球，距离一定会减小。而直接地影响中球质素。为什麽呢？

其实是一些关附於简单物理。

一号木杆，比如说，四十五寸。如果我们中球那一刻，我们手腕是曲的话，那麽我们只是以四十五寸的长度击球，对吗？

但如果我们是以平手腕击中球的话，那麽我们击球一刻就是以四十五寸长的球杆，再加上左手的长度二十六寸左右，击球。即是七十一寸长吧！而我们也没有包括由左肩到足低的长度(球杆头到足低，像Compass一般似的)，

还有，(Without a Flat Left Wrist)如果我们是以挑球的方法击球的话，那就很难有加压的意未在内。

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A “Flat” left wrist,.  Homer Bracketed “Flat” because it is all dependent on how you are looking at it, for example you can have a Flat enough wrist when you are putting. Or if you are using a mid sole pitch or chip, then a slightly bend left wrist is acceptable.

But consistency wise, A FLAT left wrist is number ONE alignment in the Golfing Machine.  (Second Paragraph in the Preface)The reason is  pretty simple.

Homer said, the true maximum swing radius is from the feet to the clubhead, but if we look at it from a  simple geometry perspective, our swing radius is from the left shoulder to CLUBSHAFT (or clubhead) during impact. (and therefore the lowest point of the swing arc is somewhere pointing directly from the left shoulder to the ground)

A standard driver is approximately 43 – 45 inches, the longer the driver is,  the further we can strike the ball. Why some people can hit further and some can’t, it is all related to the wrist condition at impact, as well as how much angular force which they can generate. More angular force equal to more clubhead speed.

As we all know for people who are scooping, the less distant that they can generate.  Why?  Simple physics..

For a driver, the club is 45inches long, if we are scooping (bent left wrist) at impact, we are talking about a lengthwise of 45 inches to strike the ball.

If we are having a FLAT left wrist, we are talking about using 45inches and the arm length of 26 inches to strike the ball.  So, we are talking about 45 +26 inches, and which gives us 71inches in total in striking the ball, excluding the maximum radius- from the shoulder to feet(similar to a compass). So what would you prefer.. a longer club or a shorter club.

Apart from the above, if we are having a through-away strike (Bent left wrist), then are we compress the ball effectively?