Turn based RPGs. I played through Persona 3, 4, and 5 on an elliptical machine in the past few months, and am now on Metaphor Refantazio. Atlus games seem perfect for this, heh. Not your pre-2005 style, but there’s plenty of old RPGs out there.

I also played through most of the Yakuzas on the elliptical too, although on easy since they didn’t become turn based until very recently.