There are always two schools of thought. One being "you are not your body - denial of the physical self" and then "you are an animal with a slightly more advanced brain".
Even though I absolutely agree that life in general reaches far, far beyond the gym and training, your physical self and the degree of healthiness you maintain IS everything YOU have in the physical world, unfortunately. I seem to embrace the idea that I am merely a highly evolved animal, here with consciousness of self. What a gift it is that we are healthy and fit. In that light I would hate to waste such a gift in my short time here physically.