In modern times, motives for hitting the pavement have become, for the most part, purely for leisure. We run for fitness, for competition and for sanity.
It's one of the most efficient, inexpensive, and effective ways to burn calories and stay in shape. Consider that the average women burns 105 calories running a mile, while the average man burns 124 calories. Compare this to walking the same distance: Women burns 74 calories walking, and men burn 88 calories [source: Burfoot]. But even though we know running is effective, it's still extremely easy to resist. Motivational dips cause declines in regularity, distance and pace, and finding the drive to strap on your sneakers is a constant psychological struggle. Fortunately, seasoned runners have several tools for maintaining the inspiration to run.