Ever see an advertisement for a fitness program? There’s typically a “before” photo and an “after” photo of a customer who followed the workout. On the left is a “before” photo of a shirtless, slouching man. He’s pale. Average-looking. He’s not smiling. Then, in the photo on the right, the same guy magically turns into a tall, bronzed, Greek God with an eight-pack of cobblestone abs. His biceps are the size of bowling balls. He’s ridiculously happy. They barely look…