Maybe not. There is something to be said for restricted calorie diets. I know I would rather look more like the monkey on the left in my golden years.
It would be a tough transition. It would take some practice. Not unlike tennis really. What part of your body do you play tennis with? Arm? Legs? You play with your brain. There are some neurons in muscle tissue but I'm pretty sure the brain does most of the playing. With a lottle bit of practice people should be able to make the same transition to the restricted a calorie diet.