宽轨--全浸教练dave

This is another of the focal points I come back to often. Most swimmers get in the habit of crossing the middle because they either

Twist across to help rotation
Run out of room on an overextension
Are trying to cross because of a warped idea of sculling or an S Stroke

这是另一个我经常关注的关注点。绝大多数人习惯于入水过中线，那是因为：

-身体扭曲帮助转动
-入水过分前伸，没有空间了
-试图进行S划

In addition to adding potential for injury, crossing tracks simply doesn’t work that well. Lateral action destablizes a body on edge, and it doesn’t provide any extra propulsive gain. It stops the shoulders and hips from working together, and makes good swimmers fishtail out back as they carry the crossing momentum through their bodies.

过中线除了增加受伤的可能性外，没有任何好处。它让你处于侧平衡的身体变得不稳定，而且并没有提供多余的推力。阻止肩膀和髋部的共同工作，让你的身体像鱼一样左右摆动。

To correct, make sure your lead arm is avoiding anything besides palm down position. Open the armpit and lean through, but don’t push the hand down while rotating. Keep feeling like you enter too wide and too early, and you’ll know that you’re moving in the right direction.

要改正这个错误，确保你的手入水时保持手掌朝下。腋下打开，然后靠上去，但是在身体转动的时候不要压手。始终感觉入水太宽太早，那么你就是在正确的道路上了。

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