Answer:
There is not really a way to make the word 'training' plural. It is in present tense, so you would say, "She is training." It might be that it needs to be worded differently, into "She trains" or "She trained." When writing a sentencing, you wouldn't say something like, "She does trainings." You should say something like "She trains a lot" or maybe "She does a lot of training."
Hope this helps!
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