Frustrating stupid blasted iPhone

Had a run-walk-run on Friday again for 30 minutes, and then a 40 minute run - walk- dick around with iPhone - run - iPhone dicking about - run etc (you get the idea). It had stuck itself on single track repeat, which is impossible to fix whilst on the run. However, in that 40 minutes, despite all the breaks and the walking, I covered 3.25 miles, so a pace of 12.27 so slow, but okay. Had enough. First day of marathon training completed.