How should we run? Will Gait retraining help?

Once all but ignored, running technique is now the topic of countless magazine and Web site articles, is taught by a growing number of running coaches, and is intensively discussed on Internet chat forums and actual training runs.

These days, the way we run is covered by one catch-all phrase.."form". But the major question to be asked and answered is:  can a correct style of running, in fact be effectively taught—or, is there is an identifiably correct way to run that every runner can learn and use to run faster and with fewer injuries? And the even bigger question may well be, "does changing form decrease or increase the risk of injury?