Pete Larson who writes a terrific, informative blog on all things running, asked me to put together a post on stress fractures in barefoot runners, which he posted here. In that article I talk specifically about second metatarsal fractures though what I describe relates to stress fractures throughout the entire lower extremity. Stress fractures are common not just to barefoot running but with running in general. Just like virtually all repetitive injuries, we are at risk for stress fractures not at impact but when the foot is fully planted and the body weight is directly over the foot.