Bit disappointed but still confident I can do this. I have already ran constantly for 25 minutes twice before but today it was much tougher this morning?? Not sure if it's down to my new shoes (following a gait analysis) or not but my calfs and shins were really burning during today's run. I'm still not stretching before the run and am just following the 5 minute warm up walk with Laura in my ears. Any tips for trying to prevent Calf / Shin burn ahead of my next run?? Any advice would be much appreciated.