Board Thread:Theories and Speculation/@comment-43776375-20190921063938/@comment-43403813-20191017101039

The Gedo Mazo was not linked to him at any time after his battle with Hanzo concluded. He just had the rods stuck in his back, that's it. In fact, Nagato used those rods to connect to the Paths of Pain in the first place, they are the exact same material as the chakra rods he can manifest himself. Find something that states that chakra was continuously being sapped from him to the Gedo Mazo after he had disconnected from it at the end of his battle with Hanzo.

I'm not sure about the Outer Path having anything to do with it. There's a somewhat link perhaps, because the Outer Path is said to govern life and death (Konan's words) but I'd say its a stretch that that is what healed him.

I suppose you could argue that he could be "rusty" at walking, but given that he had spent almost a decade as a ninja rescuing villages in the former Akatsuki, it would not take long at all to get used to walking and running. It's like learning to ride a bicycle, it's quite difficult to forget how to do it, even if you don't ride a bike for years.