Running is a popular sport and activity for all ages, but in any given year 75% of runners will sustain an injury. Certainly the high impact loads of running contribute to this but equally, poor running technique.
I can not tell you how many times I have heard runners protest that each individual is suppose to run in anyway that they find natural, and that running more frequently results in improvements in technique. I not sure which mechanism enables the incorrect repetition of skill or movement enables improvement. Granted as the body strengthens and increases in fitness some issues may be ironed out but it would seem that repetition of many movement pattern results in a greater reproduction of that pattern to the point it becomes automatic.
Could you ever imagine being given a bag of golf clubs and ball and pointed in the direction of the hole and tasked to develop your own swing? As a runner how are supposed to know what movement patterns you are aiming for?
Thorough bio-mechanical analysis has lead to technique improvement in an endless number of sports ie. tennis, golf, gymnastics, and swimming, and running is no exception.
Begin with taking a video of your running. Include :
1. Up Hill
2. Down Hill
3. Training Pace
4. Racing Pace
5. the last 1/4 of your race length run.