Guess what? There is no way to escape aging. You are of the nature to grow old and die.
Both old age and death are inevitable.
While that's hardly a heartwarming thought, it certainly is true. And it certainly is something you should think about even if thinking about it depresses you.
Because thinking about it just might get you up off your butt and exercising, get you eating good things instead of junk. Yes, I know some will read this intro and do the opposite because there's no winning a war against inevitability, but I hope that way of thinking is not for you.