there is a reason why he comes in light. Its to use his advantage of being very quick hand speed and being fit enough to recover quickly. I don't think he is blessed with legs which maybe why he is protected a little as when he gets tagged his legs cannot balance him and it make him look wobbly.
I think he must do some type of running, AJ says he doesn’t do any weights but it’s clearly not true. I think these guys exaggerate.
100 hummingbirds a day keep the dr away. Jk but serious Wilder said before in interviews he doesn't do Roadwork. Prefers pools/lakes, similar cardio much less damage done.