Sports is really just the traditional name of the category.
They are more casual watches. They will have a seconds hand and glow in the dark hands and markers. They will be able to tolerate getting wet (ie no leather).
It’s like how Oxford cloth button down shirts or cotton knit polos are sportswear, or a sport coat (it’s in the name!) or how jodhpur boots are “equestrian”, et c.
They started that way, but not so much now. Still, that’s the lineage they fall under in certain contexts.
They started that way, but not so much now. Still, that’s the lineage they fall under in certain contexts.