Wilder only fights opponents on a short notice which helps him cycle off PEDs. That's where he got his power from.
wilder winds up from way back / very few figthers do this as it leaves you off balance when you miss and also telegraphs to your opponent albeit wilder does have natural power in his short punches.
One reason for Wilder's power is that he has long arms, because when he throws a punch it goes a longer distance and it generates more power.
Core Strength he talked about working on Core Strength years ago. While he is a lean guy especially his Legs, he has a Massive Back, Shoulders and Upper Torso overall
They hollowed out his chin so there is a mini nuclear reactor in there. As a result there isn't much surrounding it, and if a large impact hit it, there would be a lot of trouble.