4 x 1 Mile Intervals: Consistent 6:36 Splits and a 20:20 5K

4 x 1 mile intervals today. Consistent splits: - Mile 3: 6:35 - Mile 4: 6:36 - Mile 5: 6:36 - Mile 6: 6:36 Hit a 20:20 5K! With recoveries between each rep, I essentially hit the same pace four times in a row. Just controlled, repeatable speed. Workouts like this are where marathon pace starts becom