He trains with the guy who does P3. They carry big rocks underwater. That's the story I remember.Korver still moves extremely well at 37 YO. And he gets great height on his jump shots.
Anyone remember that lengthy article about Korver and his friends training with some Navy SEAL badass or something and doing some insane challenge every summer? In the article I think they swam from the coast of Cali to Catalina Island. Korver was the baddest dude in the group. He trains harder than Karl Malone.