He just makes shit up and says stuff as needed to justify whatever it is he wants to do. Spews out a word salad that makes no sense but stupid people talking to him think he's being truthful. He' healthier than he's ever been but just wants his knees to feel better so he decides to squat heavy for low reps with shitty form.
Thank god for his verbal diarrhea though, some of our best comedy info comes from that: Cartoon dogs, 54 IU of GH, competing against a guy "who looked like Arnold", Black Bile, nice french toast, etc.