Intervals on track. 5 x 1000m (4:03, 3:46, 3:28, 3:18, 3:12) + 1 x 400m (1:07) / 2-3 min recovery. A good day and training session! Couldn't keep kulukukoiras speed at the last kilometer, but it didn't feel bad at all. The 400m was all out, and felt fast.