I don’t think there’s more than a struck match between any given team in the NRL when it comes to ‘fitness’ .. they all do similar pre seasons, they all do similar maintenance during the season..
The reason certain teams appear to be ‘fitter’ than others imo, is the strength of their systems...
So now we’ve got this period between the end of the NRLW grand final & the NRL GF which is like the time at a wedding when the bride & groom go off to have their photos taken & the guests have to amuse themselves for a couple of hours..