So why'd Seven take up weights?
And out of curiosity, when did her experiences diverge from yours?
She got stuck - apparently.
This was in the journals, but it was one I never ended up reading, and according to Kendra she didn't go into a whole lot of detail.
When she was first exploring the factory, she stepped on something that shifted, and she ended up with a bunch of stuff on top of her.

She got out, but it took a long time, and when she found the Moment she took up exercise in a big way.
I wonder what weird way I would have been 'different' then my next self, if I'd not run into Kendra, and Emmie, and Amie, and the end of the world.
Maybe I'd have taken up skydiving…