Running is a fundamental locomotor skill. It is a very natural activity. Unfortunately because of our sedentary lifestyle and activity deprived society this natural skill rapidly erodes in accordance with the law of reversibility. As with any skill if is not used it is quickly lost. Generally, young children run naturally with fundamentally sound running mechanics. We need to insure that this natural activity is reinforced through activity and play during childhood, so that in adolescence and latter all that is necessary is to reawaken those childhood movement patterns. If the skill has been lost through disuse it is tough to reacquire.
In running, as in all movement, there are three constants