"So I wasn't getting that conditioning every week so the All Black coaches made a decision and I responded to that really well. I agreed with them.
"[I have been] Pretty much just running. Running up and down the field while the boys were training. It has been good. I have reacted well and in terms of my goals, I wanted to get into good shape."
The coaches are satisfied that he's now reached a level where he can do himself and the team justice and Savea's selection is as much a reward for their patience as it is the giant wing's hard work.
It would have been tempting to expose Savea - put him back to Wellington and ask him to prove himself in the ITM Cup.
That was the fate of both Steven Luatua and Charlie Faumuina when they were felt to be lacking the necessary conditioning.
But Hansen was willing to be patient given the quality Savea offers when he's at his best.
They were hard on him - have put him through three intense weeks and asked him to prove his desire to be an All Black.
"We are trying to get him fit," said Hansen.
"He turned up overweight. He's been good though. His attitude has been fantastic. He's made some great gains but he's been through a bit of pain as well. He's pretty hungry - and I don't mean for food - to play again. That's a good place to have because when he's like that, he's a pretty handy footballer.
"It's a long season and maybe in Super Rugby it is pretty easy to lose focus and maybe that is what happened. But again I can't say enough how well he's taken to the task. He accepted he wasn't where he needed to be but now he's ready to play."