Swimmers do most of their training in the water, but dry-land exercises have also become important.

游泳运动员的大部分训练是在水中进行，但陆上练习也已变得十分重要。

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Because the water reduces the effects of gravity on your body, you can lie on your back to do the backstroke without risking the impaired blood flow such exercises can cause on dry land.

因为水会减轻身体受到的重力作用，你可以躺着游仰泳，从而避免在陆地上做运动引起的血液流动受阻的现象。

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