How to motivate my girlfriend into being more healthy and fit?

I am fit and my girlfriend is a bit overweight and she doesn't exercise much, and she started doing so with me, as a couple workout. But I don't think it's enough, as her sleeping and nutrition habbits need more change. Like emotional eating. On one hand I don't want to pressure her, we are only 3 months together. When I talk to her about it, I try to be positive as a journey of us both together. On the other, she needs to push a bit more for results.

P. S. I really don't want to break up with her over this, as we have a great connection I don't think I had with anyone else. I just want her to push a little more.

Updates
8 mo
I forgot to say, she told me herself that she wants to lose some weight and change. But her sayings and deeds are different.
How to motivate my girlfriend into being more healthy and fit?
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