It was definitely a WWE interview, but the cat doesn't take time off. He's had chances to milk injuries even a little bit, but chooses to cut recovery time in half.With how many injuries he's had I doubt Cena can go till he's 60 unless he seriously slows down soonish. That sounds very Cena PRish imo though what was the context?
He has a physiology degree, so he certainly could explain milking an injury further.
Then again, he's gone on record as saying his heel turn wouldn't work. I highly doubt this very much.