需要多训练的英文

Maybe you need to practice it more on your study.

尽量多锻炼保持健康的英文是take exercise as much as possible to stay healthy。也可以直接用exercise，把take去掉。

需要注意的是，这里的exercise是指的动词，意思是锻炼；行使；训练；运用。而take exercise中的exercise是指名词，意思是运动；练习；行使；演习。故前面加个动词take，表示去或做锻炼。as much as possible的意思是尽量；尽可能。stay healthy表示保持健康，其中stay可以用keep代替，意思都是一样的。

you need more exercises(具体的练习或者锻炼，可数）you need to do more exercise(抽象，集合名词，不可数)

You need more practice.