Dating chubby girls and physical activities?

I really like this girl. She's a full match. And she likes me back.

She's chubby. I don't mind. I find her body attractive.

But then it comes to activities...

Well, I live on the sixth floor walk up. She has to take a break to catch her breath already on the third or forth floor and she's panting super heavily and and sweating when she finally makes it up these stairs. The same when we go for a walk and there's a hill or an observation tower. The same if she runs even a small distance, like to catch a train.

When she's on top she gets out of breath and tired way too fast.

When I sum it all up I find her lack of stamina quite disturbing.

What's your experience with chubby girls and physical activities?

Dating chubby girls and physical activities?
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