At 28, I now know how hard it is to keep the slim figure that I used to have and to struggle against the 'love handles'. I workout twice a week and keep an eye on what I eat.
So it's unbelievable how great Elvis looked at TTWII, or even the Aloha From Hawaii. He was 35 and 38 at those moments.
How did Elvis manage to keep in shape? We all know that he loved to eat (even then) and that he practiced karate. But did he had a specific diet or a workout? Nowadays artists have personal trainers that keep them fit or bringing them back to shape before a tour.