The benefits of running can be broken down into 3 main categories:
There are a number of health benefits that running or jogging provide. A primary reason many runners begin running is to lose weight; losing excess weight is one of the healthiest things one can do. Running also prevents muscle and bone loss that occurs naturally with old age. Running may also help fight disease; it certainly helps to strengthen your heart and whole cardiovascular system.
There are large (and proven) psychological benefits to running as well. Running builds confidence in all ages of people. Going for a jog during your day can reduce your stress level drastically. And, of course, endorphins are the body's natural antidepressant.
Don't overlook the benefits of a community to turn to; the running community is very much a culture all its own. It is an important support system for many runners, providing support in their running and life. Of course, there are health and mental benefits to making friends as well.
Two of my FAVORITE quotes that I’ve happened upon recently are:
"There are 2 types of people- those who think they can, and those who think they can't, are both right".
"My running shoes have become giant erasers on my feet. Every footstrike rubs away some memory of a previous indiscretion with food or smoke or drink. Every successful mile releases me from the grip of the demons of failure. Every starting line is another chance to prove that my past will not determine my future." -John Bigham