Started running in VFFs in Feb 2010, right after the Mercedes Marathon. Loved them, because they felt good and because they totally solved severe iliotibial band pain I was getting in right leg after about mile 4 or 5. However, last year during the Statue to Statue run, I suffered a stress fracture to my right calcaneus. I let it heal for 4 months, then began slowly getting back into it. I figured it was just due to poor form on downhill, causing me to slam my heels into the ground when running downhill. When I resumed running, I was careful to work on my form to figure out how to run downhill and still forefoot strike. Made good progress and, this year, was able to do the Red Nose 10-mile, the Mercedes 1/2 marathon and the Statue to Statue 15k in my VFFs completely w/o injury. Then, last weekend, was on a planned 8-mile run w/ my usual running group and at about mile 5 or 6 I suffered a stress fracture to the 3rd metatarsal on my left foot. Went to Dr Garth Monday, and he confirmed it was a stress fracture. Because of the 2x in one year, he sent me for a bone density scan, but, based on my x-rays, expects the scan to be normal. Any thoughts? Fx occurred while running on essentially flat sidewalk. Did not hit anything on my foot, land funny, or anything obvious I can point to. Had felt absolutely great right up until that point.