3x400, 2x400, 1x400 w/ 100m rest between repeats, 4 min between sets. Tired from two workouts and a hard strength session on Monday, and back stretch wind was a wall today. Trying to get faster every set. Ran 64, 65, 65, 62, 64. The 5th one told me I was probably just gonna hurt a lot for another 64, so I stopped at 5. I've read that if you can do three sets of these your average pace is your mile pace. That 100m rest killed. Finished with some 80m starts and a 150m finish.
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