The only unrealistic girl is Oga mama, because sadly super muscular women end up with small breasts, and if they want big tits they have to use implants
It is really weird how the world hasn't gotten at least one female bodybuilder with mild macromastia/gigantomastia, so theoretically it should be possible, specially because Oga has a beer belly, which covers the actually unrealistic depiction of female abs in fiction (women have more fat in front of their abs,so they naturally can't get a 6 pack, at most and with lots of work and shaving allmost all fat, a 4 pack) which draw male abs on them