Felt so much more difficult than I would've liked. Ran with Chris' Polar watch. Really nice interface and the HR was so much steadier than my TomTom. Felt good through the warm up, and even the first half of my tempo, but hit a wall of humidity and thought I would pass out, so stopped for about a minute to pull myself together and resumed. Watch seems to think I paused two other times and stopped several times, but might have just been a GPS issue. Otherwise, good run!