Like the running economy and footwear type issue, I have been meaning to write for a while an article that summaries the studies on the differences in injury rates between heel strikers and non-heel strikers; but before I got to doing it another two studies appear, so its worth writing about those. To date we have 4 studies (now 6) that have looked at this: Daoud et al (2012) was a retrospective review of 52 almost elite level track runners ( that are not close to being representative of typical runners ) which found the injury rate in the heel strike group was almost double the forefoot striking group.
The rest is here:
Foot Strike Pattern and Injury Rates