Running for 1 hour can burn around 550 Kcal, while 1 pound of fat is equivalent to around 3,500 Kcal. Which means you can burn 1 pound of fat if you can run for more than 6 hours a week. So it is easy to see why most marathoners are in such good shape.

Yet, as well as burning fat you will sweat a lot during long hours of running, Sweat is composed mainly of mainly water and minerals such as sodium, potassium, magnesium, calcium and phosphorous. Therefore it is important to supplement your body with these minerals for the sake of assisting better energy recovery post strenuous exercise.