Benefit of running exercise.

Running Exercise Benefits
 

Running is one of the top activities for burning fat and keeping your metabolism high. In fact, with the exception of cross-country skiing, running burns more calories per minute than any other form of cardiovascular exercise.
Running reduces the risk of heart attacks, by strengthening the heart and lowering blood pressure. Running lowers blood pressure and maintains the elasticity of arteries incredibly well because as you run your arteries expand and contract nearly three times as much as usual.
Running also helps maintain and improve general health. It raises HDL(or "good") cholesterol, reduces the risk of blood clots and strokes, and encourages use of the 50% of your lungs that usually go unused.
Running also boost the immune system by creating a higher concentration of lymphocytes (white blood cells that attack disease), thus reducing the risk of getting sick or contracting a disease.
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Mental Benefit of Running Exercise
Running can help train the mind as much as it trains the body. By making yourself overcome the obstacles that running brings, you learn focus and determination. The will and strength that gets your body through long runs or those runs you'd much rather skip is what in turn strengthens your mind and gives you focus and determination in other areas of your life.
Long distance running helps ”clear the mind”, and allows you time to think about life’s challenges or time to escape them for awhile.
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Emotional Benefit of Running Exercise
Running, especially outside and on trails, creates a release of endorphins that can cause euphoria (runner's high) or just a general sense of happiness. Running also helps relieves stress, generally improves your attitude, and gives yourself a sense of satisfaction that you have accomplish something challenging.
A word of caution is to not to try to do too much too fast or the extreme and intense running may lead to injury or suppress the immune system. But to those who run regularly within limits and include proper nutrition and rest, will find running is beneficial to your overall health.