Its not all about physical fitness. Quality of life is everything. The mental, spirtual and physical well being of a 70 year who has remained fit their whole lives is priceless.
Those that excercise regularly aid the environment, generally lead more balanced lives and tend to interact regularly with friends outdoors.

The couch potatos of the world generally remain unfulfilled because they never muster up the personal strength to challenge themselves physically.
Its not about being the best athlete our dominant competitor, its about using your body to empower your mind!