Exercise is not solely about living longer, though an additional four years on average isn't exactly trivial. The anecdotes abound about the positive impacts.

Exercise is not solely about living longer, though an additional four years on average isn't exactly trivial. The anecdotes abound about the positive impacts. Dismiss them in favor of scientific studies at your own peril. My own anecdote: I lost 90 lbs and started lifting and it's done wonders for various aspects of my life. I recognize that my experience may not apply to everyone but it also seems reasonable given our evolutionary history that regular movement would have benefits.