Since trying to get into barefoot running I just haven’t been able to eek out the miles that I use to. Training your body for the change requires your running to be broken into intervals of walking and running, this eases your legs and feet into the new stride. A side affect of this can be a lessening of your overall endurance since you’re only able to push out a mile or two at a time.
Today I decided to put on my old non-barefoot shoes and make sure I hadn’t lost any of the endurance I had built up. Since I broke into the 4 mile mark it looks like I still have it. :)