With two years to go before the start of the World Cup the All Blacks assistant coach Steve Hansen says they're looking again at how to manager senior players.
Hansen says if their workloads aren't well managed through Super and provincial rugby they won't last.
But he says that won't see a repeat of the build up to the last World Cup when when key players were kept out of the first half of the Super 14.
Hansen says that was a disaster for competition, although it re-charged the players batteries.
He says for the sake of the competion they'll have to find other ways to ensure players don't burn out and head overseas or get injured and retire.